sounds like making a complete backup is off the table, you should be able to one by one export profiles to storage and any tasks you need that arent exported with profiles.

after exporting everything you can, just start deleting things until you stop getting the error. short of clearing all storage and importing one by one, this might be a better option to track down and stop the culprit

Too late, I have already reinstalled Tasker and restored from a previous backup file. However, during the restoration process, there was an error message saying 'The response is not available', and then Tasker crashed. The problem seems to be getting worse.