Desktop pbix will not open

Just got this error again on a second separate file. Did raise a support ticket for the first file, which after support trying several things which were clearly never going to work, got nowhere other than an indication that "data might have been corrupted when saving". Which isn't confidence inspiring, and I have no clue why, if Desktop recognises corrupted data like this, it doesn't just flush all the data out and retain the queries/report design elements so it'll at least open