Problem with web application. asp.net.core. error 502.5

I have a problem with my web application. I just created my first web application."Probably" after updating my database I got an error message "HTTP Error 502.5 - Process Failure". I know that I can find on stackoverflow plenty of solution of this problem but couldn't find an exact solution. Since it is a dot net core project, I don't have a "web.config". HEEEEELP

BigProject.csproj:

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
  <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <None Include="wwwroot\index.html" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.1.2" PrivateAssets="All" />
    <PackageReference Include="OdeToCode.UseNodeModules" Version="1.0.6" />
  </ItemGroup>

  <ItemGroup>
    <Folder Include="Services\" />
    <Folder Include="Views\Shared\" />
  </ItemGroup>

  <ProjectExtensions><VisualStudio><UserProperties package_1json__JSONSchema="" /></VisualStudio></ProjectExtensions>

</Project>

package.json:

{
  "version": "^1.0.0",
  "name": "asp.net",
  "private": true,
  "dependencies": {
    "bootstrap": "^4.1.1",
    "jquery": "^3.3.1",
    "jquery-validation": "^1.17.0",
    "jquery-validation-unobtrusive": "^3.2.10"
  },
  "devDependencies": {}
}

launchSettings.json

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:8888/",
      "sslPort": 44370
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "BigProject": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "applicationUrl": "https://localhost:5001;http://localhost:5000"
    }
  }
}

project.assets.json

version": 3,
  "targets": {
    ".NETCoreApp,Version=v2.1": {
      "Microsoft.AspNet.WebApi.Client/5.2.6": {
        "type": "package",
        "dependencies": {
          "Newtonsoft.Json": "10.0.1",
          "Newtonsoft.Json.Bson": "1.0.1"
        },
        "compile": {
          "lib/netstandard2.0/System.Net.Http.Formatting.dll": {}
        },
        "runtime": {
          "lib/netstandard2.0/System.Net.Http.Formatting.dll": {}
        }
      },
      "Microsoft.AspNetCore/2.1.1": {
        "type": "package",
        "dependencies": {
          "Microsoft.AspNetCore.Diagnostics": "2.1.1",
          "Microsoft.AspNetCore.HostFiltering": "2.1.1",
          "Microsoft.AspNetCore.Hosting": "2.1.1",
          "Microsoft.AspNetCore.Routing": "2.1.1",
          "Microsoft.AspNetCore.Server.IISIntegration": "2.1.1",
          "Microsoft.AspNetCore.Server.Kestrel": "2.1.1",
          "Microsoft.AspNetCore.Server.Kestrel.Https": "2.1.1",
          "Microsoft.Extensions.Configuration.CommandLine": "2.1.1",
          "Microsoft.Extensions.Configuration.EnvironmentVariables": "2.1.1",
          "Microsoft.Extensions.Configuration.FileExtensions": "2.1.1",
          "Microsoft.Extensions.Configuration.Json": "2.1.1",
          "Microsoft.Extensions.Configuration.UserSecrets": "2.1.1",
          "Microsoft.Extensions.Logging": "2.1.1",
          "Microsoft.Extensions.Logging.Configuration": "2.1.1",
          "Microsoft.Extensions.Logging.Console": "2.1.1",
          "Microsoft.Extensions.Logging.Debug": "2.1.1"
        },
        "compile": {
          "lib/netstandard2.0/Microsoft.AspNetCore.dll": {}
        },
        "runtime": {
          "lib/netstandard2.0/Microsoft.AspNetCore.dll": {}
        }

Error from event viewer:

Application 'MACHINE/WEBROOT/APPHOST/BIGPROJECT' with physical root 'C:\Users\prywatny\Desktop\Projekt Visual Studio\BigProject\BigProject\' failed to start process with commandline 'c:\program files (x86)\microsoft visual studio\2017\community\common7\ide\extensions\microsoft\web tools\projectsystem\VSIISExeLauncher.exe -argFile "C:\Users\prywatny\AppData\Local\Temp\tmp98B6.tmp"', ErrorCode = '0x80004005' : 0.