Prefabs causing Unity to Crash

Hey,

I somewhat recently updated Unity from 2017.2 to 2019.2 and now whenever I try to edit a prefab or save a prefab Unity crashes. I'm guessing it might be related to prefab dependencies? Has anyone encountered this and might have an idea how to fix? It happens even with newly created prefabs that shouldn't really have problems. I'm not sure what to do other than to maybe have to delete all of my prefabs which would be awful for like a 5 year old project.

Unity is also telling me above the menus that PREVIEW PACKAGES ARE IN USE but I think this might be something unrelated.

 

I'm not aware we have any reports of such an issue. Please file a bug report with repro project and repro steps so we can look into it. Thanks!