Can't get build 42 to work

Build 41 works perfectly. But as soon as I try and launch build 42 it just crashes to home screen as soon as I hit play.

If selected build 42 as the option when adding build 42s game files, tried to select build 41 and then select build 42s game files to create the instance.

Nothing works. Not sure what I'm doing wrong.

1tb Zfold 7 with 16gb ram, if it means anything.