I cannot save my lot or upload it to the gallery

I am using a PC laptop and I can't save any of my lots. I tried to save a large home and got the error message "Server error. We could not process this Gallery request. Please try again later." I tries to save a smaller build that was just one room with a roof and got the same error. I don't know what to do. Building home is my favorite thing. I have no CC or mods.