Dear @Jimbohalo10 , thanks again for helping me!
It’s now solved… It was realy my mistake! In addition to the Referenced Content Asset, I had a migrated version of the asset that wasn’t showing up in UEFN! I was able to delete it using the file manager, and since then the Referenced Content Asset “CGMA Studio Offices” has been working again! UEFN 36.10 had no problem with it…