EntityFramework error: The provider did not return a ProviderManifest instance

Question

My project is using ASP.NET MVC4, in C# with Visual Studio 2012 for Web Express.

When compiling my project, I have the following error:

The pr

Answer 1

Replacing 2012 with 2008 in ProviderManifestToken="2012" in the .edmx file worked for me.

1. Replace 2012 with 2008 in ProviderManifestToken="2012"
2. Save the .edmx file
3. Clean and rebuild solution