In terms of version it is displaying as '1.2.13' (I've had to select 1.2.13.60 above)

I've attached 3 screenshots - basically my 2 worlds "JAPS" (James Alex Sophie Paul, for context) and "Brophtropolis" (the one I'm most bothered about as I've ploughed 150+ hours into) are displaying as grey on my worlds list. The strange thing I noticed is that it looks like the worlds have been switched, as the Brophtropolis world is the 174.5MB file.

When I load either of them, or click edit I get the error:

'Failed to sync world data, the world is not fully synced or has been corrupted. Try playing the world on a console where it's in a good state and try migrating it again'. I also noticed that once I select the edit icon, I get the same error message and then the file names change and size turns to 0.01MB.

I've contacted xbox support as the logical solution here would be to restore an earlier version (from say 11AM yesterday) but they've said this isn't possible.

If there is anywhere you can point me this would be hugely appreciated. I can't stress the disappointment of more than likely losing this world. I'm probably done with MC if I can't get this back =/

Kind Regards
Paul B