I having a problem updating a project from 5.7 to 5.8. I did an update as a copy and that worked fine. Then, I updated in-place and it gave the SetEnv" task failed unexpectedly. - Environment variable name or value is too long.
I rolled back and got the same error.
I then tried cloning from my repo from 5.7, right clicked on project and converted to 5.8. I updated my plugin source to the 5.8 versions. I generated the solution. Opened VS. Waited for NuGet Packages. Went to build and got the same error again.
Any ideas?