Baldurs Gate 3 developer Larian Studios has now rolled back its recently released hotfix 4 after the teams latest update apparently introduced new crashes to the game. Unfortunately, those that installed the update and saved the game afterwards will not be able to load these files until after the patch has been re-published, which means you may have to start over at a certain point again.
Source: N4G PC Baldurs Gate 3 devs roll back latest hotfix after as update caused new crashes