Can’t place own lot - “system error”

Hello, I tried to save my house to the gallery so that I could place it on my other save but it just shows up on my own profile and not in my saved gallery. When I go to my other save and I try to place the plot it just says “system error”, and it has done that in whatever save I am on, I even tried to make a whole new game save. I deleted most of the debug items since I heard that that could be the problem and I also moved all my mods from my mods file but nothing works. Please help