Can't create projects

I am facing an issue with Visual Studio 2015. When I click on new project/add new file, I get an error message. I get this error even for clicking few menu items.

Set property 'System.Windows.ResourceDictionary.DeferrableContent' threw an exception.

I even get few more errors like:

The 'XamlDesignerPackage' package did not load correctly.

The problem may have been caused by a configuration change or by the installation of another extension. You can get more information by examining the file 'C:\Users\MY PC\AppData\Roaming\Microsoft\VisualStudio\14.0\ActivityLog.xml'.

Restarting Visual Studio could help resolve this issue.

I have tried repair and reinstall(uninstall and install again) both didn't have any effect.

These are the errors found in ActivityLog.xml

<entry>
<record>392</record>
<time>2018/02/09 02:11:35.915</time>
<type>Error</type>
<source>Extension Manager</source>
<description>Extension will not be loaded because an extension with the same ID &apos;Microsoft.Windows.DevelopmentKit.Desktop&apos; is already loaded at C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\10\DESKTOP SDK\...</description>
<path>C:\PROGRAM FILES (X86)\COMMON FILES\MICROSOFT\EXTENSIONMANAGER\EXTENSIONS\MICROSOFT\WINDOWS KITS\8.1\DESKTOP SDK\</path>

<entry>
<record>400</record>
<time>2018/02/09 02:11:47.980</time>
<type>Error</type>
<source>Microsoft.VisualStudio.CommonIDE.ExtensibilityHosting.VsShellComponentModelHost</source>
<description>Still unable to load MEF component DLL: Could not load file or assembly &apos;Microsoft.VisualStudio.Workspaces.Contracts, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos; or one of its dependencies. Could not find or load a type. (Exception from HRESULT: 0x80131522)</description>
<path>C:\PROGRAM FILES (X86)\MICROSOFT VISUAL STUDIO 14.0\COMMON7\IDE\EXTENSIONS\HEXW0BB4.KCG\TMLanguage.dll</path>

<entry>
<record>420</record>
<time>2018/02/09 02:12:00.074</time>
<type>Error</type>
<source>VisualStudio</source>
<description>SetSite failed for package [ServiceProviderPackage]Source: &apos;GitHub.VisualStudio&apos; Description: Could not load type &apos;GitHub.Services.IUIProvider&apos; from assembly &apos;GitHub.Exports, Version=2.4.2.1331, Culture=neutral, PublicKeyToken=bc1bd09f2901c82e&apos;.&#x000D;&#x000A;System.TypeLoadException: Could not load type &apos;GitHub.Services.IUIProvider&apos; from assembly &apos;GitHub.Exports, Version=2.4.2.1331, Culture=neutral, PublicKeyToken=bc1bd09f2901c82e&apos;.&#x000D;&#x000A;   at GitHub.VisualStudio.ServiceProviderPackage.InitializeAsync(CancellationToken cancellationToken, IProgress`1 progress)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.AsyncPackage.&lt;&gt;c__DisplayClass16_0.&lt;&lt;Microsoft-VisualStudio-Shell-Interop-IAsyncLoadablePackageInitialize-Initialize&gt;b__1&gt;d.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.GetResult()</description>
<guid>{D5CE1488-DEDE-426D-9E5B-BFCCFBE33E53}</guid>
<hr>80131522</hr>
<errorinfo></errorinfo>

And there are few more.