Error in Visual Studio 2015 When Add New WebForm

Question

When I add new WebForm to my project, I get the following error:

Could not load file or assembly \'Microsoft.VisualStudio.JSLS,Vers

Answer 1

A temporary solution:

Shut down Visual Studio and reinstall the following package from the DVD or ISO:

x:\packages\JavaScript_LanguageService\JavaScript_LanguageService.msi

A better solution, endorsed by Microsoft, has been posted.