VS 2017 Metadata file '.dll could not be found

Question

I know there is another question with exact the same problem, but I went trough all those answers, and none helped me. :( (This was the question.)

I just created a new A

Answer 1

For me cleaning and building didn't work. Unloading the project didn't work. Restarting Visual Studio or even the pc didn't work. This is what did work:

Go to each of the projects that are throwing the error, and in References, delete the reference to the problematic project and add it again. That solves the issue.

The problem seems to be related to moving a project around (Move it inside a folder for example), then a different project that references it, have its path wrong and can't find it.