MacOS Big Sur, "A copy of Zotero is already open. Only one copy of Zotero can be open at a time."err

I am not able to open Zotero after shutting down my computer and restarting the application. There is no copy open but the error says a copy is already open.
I have looked at all the threads, restarted my computer, looked for the .parentlock but no such a file in directory. Can anyone help please?
Sign In or Register to comment.