Serious error message and shutdown when trying to open Premiere Pro project file

I was working on a project evening of May 18th. Did an export and then shutdown for the night. When I tried to open the project file the next morning, serious error message and PP auto shutdown. Tried recent autosave files and they crash as well. Tried restarting Macbook Pro (most recent version), reinstalled PP 14.2. Sent project file to editor who has mirrored files. Crashes for him too. Any ideas?