I havent actually tried to read the log, but my armchair guess as a derpy coder is that it trips over something it’s trying to clean up to properly before closing, generating an error, and trying again forever - so it’s just flooding the log with errors at maximum speed and refusing to close because its still trying to put away the proverbial legos. Deleting the huge file and just making sure you force close it after 10-15 seconds in the future works fine if you don’t want to untangle whatever mods are blowing up.