Can't save lots to My Library

For the past few months, I haven’t been able to save any existing lot from any world to My Library, regardless of the lot size or whether it contains custom content. Every time I try to save a lot, I get the following error message: “Timed out during upload. Please check the internet connection or try again in a minute.” I’ve already tried several troubleshooting steps that were recommended to me, such as clearing the cache and other suggested fixes, but unfortunately, nothing has worked. This issue happens with any lot I try to save, and it has been going on for months. At this point, I’m not sure what else I can try...