Build Failure. Error: 'path' cannot be an empty string (“”) or start with the null character

Question

I have a solution that builds fine in VS2015. I just installed VS2017 RTM and after conversion, attempts to build the solution fail immediately with the error:

Answer 1

I also had this problem with all of my VS2015 (aka project.json) - projects. Deleting the .vs folder didn't solve the problem.

I finally come up with disabling the "lightweight solutions load" checkbox under Tools -> Options -> Projects and Solutions -> Lightweight solution load for all solutions