Error : ClassNotFoundException: com.zaxxer.hikari.HikariConfig

I've been getting this error for the past couple of days and really struggling to fix it.

I have read about similar issue on other posts, apparently HikariCP needs to be shaded. I seem to have not done it correctly, or maybe the problem comes from elsewhere. Any help will be very apreciated.

For info , this is a java project using maven and appengine.

Below is whatever came out onto my console.

AVERTISSEMENT: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
f�vr. 07, 2020 12:05:38 PM com.google.appengine.tools.development.SystemPropertiesManager setSystemProperties
INFOS: Overwriting system property key 'java.util.logging.config.file', value 'C:\Users\ORVIFSTAGIERE\AppData\Local\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\google\appengine\tools\java\config\sdk\logging.properties' with value 'WEB-INF/logging.properties' from 'C:\Users\ORVIFSTAGIERE\Desktop\jk\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\website\WEB-INF\appengine-web.xml'
2020-02-07 12:05:38.948:INFO::main: Logging initialized @655ms to org.eclipse.jetty.util.log.StdErrLog
2020-02-07 12:05:39.020:WARN:oejs.AbstractConnector:main: Ignoring deprecated socket close linger time
2020-02-07 12:05:39.440:INFO:oejs.Server:main: jetty-9.4.24.v20191120; built: 2019-11-20T21:37:49.771Z; git: 363d5f2df3a8a28de40604320230664b9c793c16; jvm 1.8.0_161-b12
2020-02-07 12:05:39.732:INFO:oeju.TypeUtil:main: JVM Runtime does not support Modules
2020-02-07 12:05:40.581:INFO:oeja.AnnotationConfiguration:main: Scanning elapsed time=840ms
2020-02-07 12:05:40.705:WARN:oeja.WebServletAnnotation:main: com.orvif.servletsClient.ServletCartValidations defines neither @WebServlet.value nor @WebServlet.urlPatterns
2020-02-07 12:05:40.928:WARN:oejw.WebAppContext:main: Failed startup of context c.g.a.t.d.j.DevAppEngineWebAppContext@6892b3b6{ORVIF,/,file:///C:/Users/ORVIFSTAGIERE/Desktop/jk/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/website/,UNAVAILABLE}{C:\Users\ORVIFSTAGIERE\Desktop\jk\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\website}
java.lang.NoClassDefFoundError: com/zaxxer/hikari/HikariConfig
    at com.orvif.dao.DAOFactory.<init>(DAOFactory.java:26)
    at com.orvif.dao.DAOFactory.getInstance(DAOFactory.java:101)
    at com.orvif.config.InitilisationApp.contextInitialized(InitilisationApp.java:29)
    at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:930)
    at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:553)
    at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:889)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:356)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1445)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1409)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:822)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:275)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:100)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
    at org.eclipse.jetty.server.Server.start(Server.java:407)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:100)
    at org.eclipse.jetty.server.Server.doStart(Server.java:371)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at com.google.appengine.tools.development.jetty9.JettyContainerService.startContainer(JettyContainerService.java:367)
    at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:283)
    at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26)
    at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:87)
    at com.google.appengine.tools.development.Modules.startup(Modules.java:105)
    at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:271)
    at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:44)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:220)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:218)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:218)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:404)
    at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:45)
    at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:257)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:248)
Caused by: 
java.lang.ClassNotFoundException: com.zaxxer.hikari.HikariConfig
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:208)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at com.orvif.dao.DAOFactory.<init>(DAOFactory.java:26)
    at com.orvif.dao.DAOFactory.getInstance(DAOFactory.java:101)
    at com.orvif.config.InitilisationApp.contextInitialized(InitilisationApp.java:29)
    at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:930)
    at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:553)
    at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:889)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:356)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1445)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1409)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:822)
    at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:275)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:100)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
    at org.eclipse.jetty.server.Server.start(Server.java:407)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:100)
    at org.eclipse.jetty.server.Server.doStart(Server.java:371)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
    at com.google.appengine.tools.development.jetty9.JettyContainerService.startContainer(JettyContainerService.java:367)
    at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:283)
    at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26)
    at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:87)
    at com.google.appengine.tools.development.Modules.startup(Modules.java:105)
    at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:271)
    at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:44)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:220)
    at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:218)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:218)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:404)
    at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:45)
    at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:257)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:248)
2020-02-07 12:05:42.085:INFO:oejs.session:main: DefaultSessionIdManager workerName=node0
2020-02-07 12:05:42.085:INFO:oejs.session:main: node0 Scavenging disabled
2020-02-07 12:05:42.104:INFO:oejs.AbstractConnector:main: Started NetworkTrafficSelectChannelConnector@6e6c3152{HTTP/1.1,[http/1.1]}{localhost:8080}
2020-02-07 12:05:42.105:INFO:oejs.Server:main: Started @3812ms
f�vr. 07, 2020 11:05:42 AM com.google.appengine.tools.development.jetty9.JettyContainerService startHotDeployScanner
INFOS: Full scan of the web app in place every 1s.
f�vr. 07, 2020 11:05:42 AM com.google.appengine.tools.development.AbstractModule startup
INFOS: Module instance default is running at http://localhost:8080/
f�vr. 07, 2020 11:05:42 AM com.google.appengine.tools.development.AbstractModule startup
INFOS: The admin console is running at http://localhost:8080/_ah/admin
f�vr. 07, 2020 12:05:42 PM com.google.appengine.tools.development.DevAppServerImpl doStart
INFOS: Dev App Server is now running```


Below is my POM.xml file

    <modelVersion>4.0.0</modelVersion>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>

    <groupId>com.orvif.website</groupId>
    <artifactId>website</artifactId>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.showDeprecation>true</maven.compiler.showDeprecation>
        <archiveClasses>true</archiveClasses>
    </properties>

    <prerequisites>
        <maven>3.5</maven>
    </prerequisites>

    <dependencies>
        <!-- Compile/runtime dependencies -->

        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>1.9.78</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <type>jar</type>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-core</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-client</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey.contribs</groupId>
            <artifactId>jersey-multipart</artifactId>
            <version>1.19.4</version>
        </dependency>
        <!--<dependency>-->
        <!--<groupId>jstl</groupId>-->
        <!--<artifactId>jstl</artifactId>-->
        <!--<version>1.2</version>-->
        <!--</dependency>-->


        <!-- Test Dependencies -->
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-testing</artifactId>
            <version>1.9.78</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-stubs</artifactId>
            <version>1.9.78</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-tools-sdk</artifactId>
            <version>1.9.78</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.google.truth</groupId>
            <artifactId>truth</artifactId>
            <version>1.0.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-all</artifactId>
            <version>2.0.2-beta</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.jcraft</groupId>
            <artifactId>jsch</artifactId>
            <version>0.1.55</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.6</version>
        </dependency>
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.10.5</version>
        </dependency>
        <dependency>
            <groupId>com.googlecode.objectify</groupId>
            <artifactId>objectify</artifactId>
            <version>6.0.6</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.14</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jna</groupId>
            <artifactId>jna</artifactId>
            <version>3.0.9</version>
        </dependency>
        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>platform</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>com.google.cloud.sql</groupId>
            <artifactId>mysql-socket-factory-connector-j-8</artifactId>
            <version>1.0.15</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.19</version>
        </dependency>
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.5.0-b01</version>
        </dependency>
        <dependency>
            <groupId>org.apache.taglibs</groupId>
            <artifactId>taglibs-standard-impl</artifactId>
            <version>1.2.5</version>
        </dependency>
        <dependency>
            <groupId>com.google.appengine.tools</groupId>
            <artifactId>appengine-gcs-client</artifactId>
            <version>0.8</version>
        </dependency>
        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-storage</artifactId>
            <version>1.103.1</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
            <version>3.3.1</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

    <build>
        <!-- for hot reload of the web application -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
        <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
        <plugins>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
            </plugin>

                  <!--        <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.4.3</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <filters>
                                <filter>
                                    <artifact>*:*</artifact>
                                    <excludes>
                                        <exclude>META-INF/*.SF</exclude>
                                        <exclude>META-INF/*.DSA</exclude>
                                        <exclude>META-INF/*.RSA</exclude>
                                    </excludes>
                                </filter>
                            </filters>
                        </configuration>
                    </execution>
                </executions>
            </plugin> -->

            <plugin>
                <groupId>com.google.appengine</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>1.9.76</version>
                <configuration>
                    <project>orvifgcp</project>
                    <version>1</version>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>versions-maven-plugin</artifactId>
                <version>2.3</version>
                <executions>
                    <execution>
                        <phase>compile</phase>
                        <goals>
                            <goal>display-dependency-updates</goal>
                            <goal>display-plugin-updates</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <excludes>
                        <exclude>javax.servlet:javax.servlet-api</exclude>
                        <exclude>com.google.guava:guava</exclude> <!-- avoid android version -->
                    </excludes>
                </configuration>
            </plugin>

            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.1.0</version>
            </plugin>



            <plugin>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.0.0</version>
            </plugin>

            <plugin>
                <artifactId>maven-install-plugin</artifactId>
                <version>2.5.2</version>
            </plugin>

            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.20</version>
            </plugin>

            <plugin>
                <artifactId>maven-site-plugin</artifactId>
                <version>3.6</version>
            </plugin>

            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.0.2</version>
            </plugin>

            <plugin>
                <artifactId>maven-deploy-plugin</artifactId>
                <version>2.7</version>
            </plugin>


            <plugin>
                <artifactId>maven-enforcer-plugin</artifactId>
                <version>1.4.1</version>
                <executions>
                    <execution>
                        <id>enforce-maven</id>
                        <goals>
                            <goal>enforce</goal>
                        </goals>
                        <configuration>
                            <rules>
                                <requireMavenVersion>
                                    <version>3.5</version>
                                </requireMavenVersion>
                                <requirePluginVersions>
                                    <message>Best Practice is to always define plugin versions!</message>
                                    <banLatest>true</banLatest>
                                    <banRelease>true</banRelease>
                                    <phases>
                                        clean,deploy,verify,appengine:run,appengine:deploy,appengine:update,appengine:devappaserver,site
                                    </phases>
                                </requirePluginVersions>
                            </rules>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>