Hello,
I worked with Factory objects. Imported new ones and deleted few. Among the few deleted ones where the ones that were used in outbound reference from Project objects.
After this, Assets is no able to load the list of projects. As shown below i can access the projects using links from Machine objects. The outbound references are deleted for Project objects as expected, but the list is not operational.

I create the objects that the project objects were referencing.
It is still possible to access the project objects if i open Machine objects and use the project link from there

