Nuget - Package restore failed. Rolling back package changes for 'WebApplication1'. 0

Question

It\'s my own custom nuget package that I\'ve not published yet and testing locally.

The nuget package consists of a dll file and nuspec file is as follows.

Answer 1

I had to change the Build Configuration due to an NU1603: warning.

In my Build configuration the "Treat warnings as errors" was set to All.

This was blocking Nuget from upgrading the Package due to the NU1603 warning.