The Problem/Crash happens when you select 'no' when the popup shows then go to a new/other scene and from there go back to the original scene and the popup happens again. Selecting no causes a crash.
If you cant recreate this problem I will try to get a video this weekend.
Edit: The null you put in the scene keeps getting put in the scene. If I delete it, save it and then reopen, that null is back. Even though I have no octane materials in my scene no tags and the live viewer has never been opened and not even any render settings (manually deleted the left behind data) This null and the vp are whats causing all these problems.