When trying to save my Unreal map, I get an error saying that the Built Data can't save because it's partially loaded

I’m fairly new to Unreal(I’ve been doing it for about 4 months), and haven’t really had any problems. However, when I was working on it today, I pressed save and got an error that said:

The asset ‘/Game/ThirdPersonBP/Maps/ThirdPersonExampleMap_BuiltData’ (ThirdPersonExampleMap_BuiltData.uasset) failed to save.

Cancel: Stop saving all assets and return to the editor.
Retry: Attempt to save the asset again.
Continue: Skip saving this asset only.

After pressing Continue, I get another error that says:

The following assets failed to save correctly:
/Game/ThirdPersonBP/Maps/ThirdPersonExampleMap_BuiltData

325077-unreal-error.png

Then, I get another error saying that the asset failed to save, as it is only partially loaded.

Can someone please help me with this, I’ve went through so many websites and none have had the fix to my problem. I’ve checked to make sure there is only one map open, I have also tried restarting multiple times, and deleting the built data and rebuilding the lighting, but that doesn’t work either. I’ve even tried to go into the files and locate the backups, but those all have the same issue as well. If you know how to fix this, can you please help me?