NuGet Package restore failed for project Miscellaneous Files: Value cannot be null or an empty string. Parameter name: root. 0 0

Question

I have such error in vs 2012: NuGet Package restore failed for project Miscellaneous Files: Value cannot be null or an empty string. Parameter name: root. 0 0

I see

Answer 1

None of the above answers helped for me, and it was getting pretty frustrating.

What worked for me (with Visual Studio Professional 2017, version 15.8.5) was doing the following steps;

1) Tools > Options > NuGet Package Manager > Click 'Clear All NuGet Cache(s)'

Hope this helps someone!