I have a bunch of import statements that are underlined in red and when I roll over they say "unresolved reference...". So I go into the Project Interpreters, select my virtual environment, go to the Paths tab, and add the path to the libraries that are affected. In one of my 3 projects when I clicked OK, I saw "Indexing" at the bottom of the window and everything worked. In the other 2 projects, no matter what I do, I cannot get them to index. I have tried restarting PyCharm, File -> Invalidate Caches, Hitting Apply instead of OK, clicking that little rotating arrows icon first, adding them one at a time. Nothing seems to work. Ideas?