RStudio project “cannot find the file specified” on R session restart

Question

I am getting strange and annoying behavior in one (yes, only one) of my RStudio projects. Whenever I restart the R session within this project, I can no longer save any of t

Answer 1

May not be related but might be helpful to someone else. I was getting the same error (over and over) and finally realized that I had an R session open from days ago, that had eventually gotten stuck. It was running in the background with a "Fatal Error" message waiting for me to click OK. When I closed that session everything started working again.