I am on Linux (Editor version 5.3) and my workaround is deleting the project and using VCS to retrieve it again so that the project can be opened, hence, similar to deleting certain folders. However, I have had no luck finding out which files are causing the issue, and even after the project is downloaded again the error message persists even though it is possible to run the project…
Would be nice with a solution for such a major issue and not just workarounds.