Solved
Error Code 123:9d5d0e8f:b1d3c02d
I recently bought and installed Sims 4 Seasons. I loaded up my game and it went in an endless loading loop. I tried again and it worked fine so I made a family and moved them in. Once again, it kept ...
Custom content can get outdated with patches. If it works when you remove your mods folder, then one or more mods/cc is no longer compatible with the game and you have to find those.
Use the 50/50 method: http://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content
EDIT: Merged a few threads for the same error code
This error is mod related.
