Maybe try this approach, just delete the content.xml as it’s written here, it might help:
Another option is to move everything out of the Official folder, start the sim, it should state that it has to download >100GB. Let it start, then exit, delete the files from the Official folder (which it started to re-download) and move back the earlier moved original contents of the Offical folder back where they were.
I did not try this approach, so be careful. But that’s what I would try. Reinstalling the whole sim should be your last option.