An exception has been encountered. This may be caused by an extension in Visual Studio :

Error image

Fix :

All you have to do is : Extensions > Manage Extensions > Updates > Update All/Update

Also you can find out and disable the only extension, which is creating the problem

Updating Visual Studio itself (if an update is available) is also advised.

NOTE : The Extensions menu is between Tools and Window.

Finally, Restart the visual studio and the roblem will resolve. Hope this will help others.