This seems to be on par with the sort of issues experienced when the editor for the first game came out. I seem to remember extracting the pak files resolving some of the issues with the first editor, so maybe that's worth trying here.
Also workshop doesn't seem to be enabled on Steam so none of the publishing features in the editor or GM mode work.
Edit: Workshop just got enabled. It seems like the crashes might be related to missing the "Data" files the editor needed. I suggest reading the wiki for setup
https://docs.larian.game/Setting_up_the_editor as I imagine it will clear up a lot of the issues we're experiencing.
