I am working on a project in Revit 2021, I have created an architectural Shell model with panel assemblies. When I try to add doors to the panel assemblies or even try to delete/move/copy them, I get a message saying a serious error has occurred, we recommend you create a recovery file.
A couple days ago I was able to add doors and edit the panel assemblies just fine, and all of a sudden I started getting this error. I have already tried deleting the local file and creating a new one, restarting the Autodesk Desktop Connector, restarting Revit. All files are linked as they should be.