Where do you create new projects? What reference paths are in MGCB file? Exception seems like it’s something that has to do with your system not permitting to write into the file. I’ve seen something baguely similar with some security settings.
Blank projects aren’t supposed to compile by themselves, they need Shared project to be referenced in them.
…and yes, I’ve fucked up reference paths for blank projects. : - D
Will fix it right away.
Issue: Developer Community
Also, nuget will not work, since you need to set up some files to make Monofoxe work, which goes against “make it at simple as possible” rule of mine.