I\'m developing a mobile app and using MS App Center for CI. Yesterday the Unit Test project failed to build in App Center with the following error. I couldn\'t recreate the
What solved the issue for me, was to update the default NuGet package cache 'C:\Users\.nuget\packages' used for restore by changing the parameter in msvc:
Tools > Options > NuGet Package Manager > Package Restore > Allow NuGet to download missing package & Automatically check for missing packages during build in Visual Studio.