The creators of Baldur's Gate 3 have released an update that has caused saves to stop working for some players.
The thing is that with the release of the patch, the developers have made it so that saves will no longer load for users who have installed 100 or more mods. They are not deleted or corrupted, and you can fix everything by deleting some mods. You need to have no more than 50 modifications installed in your client, then everything will work as before.
In addition, the patch has corrected several other errors.