I can't even pick a material without the engine crashes. Actually, it crashes if I do most things in the engine, very unstable atm.
Did you install the editor data dlc as explained in
https://docs.larian.game/Setup:_Editor_Steam ?
If it's not available to you: apparently something was wrongly configured so that's it not yet available to everyone. It will be fixed as soon as possible. Without this DLC, the editor will indeed crash constantly.