Crash when loading project - access violation (code c0000005)

It appears that we’re having this issue crashing at 93% based on editing a pawn. We can revert it to a stage when we can load it, but then as soon as we modify it (add any node) it crashes the launcher.

Tried zipping and putting it in a new folder, tried deleting intermediate / saved / derived data cash.

We’ve isolated a pawn. When you modify it in any way and save, the project no longer loads. Even if you delete intermediate or zip / deploy in another folder. We’re having the same problem across all machines.