Re: Error Code 123:9d5d0e8f:b1d3c02d

If the game works without your CC and mods in, your issue is probably caused by a broken mod or CC.
You can find a full list of broken/incompatible CC and mods since the Seasons expansion pack over here:
https://forums.thesims.com/en_US/discussion/941998/broken-updated-mods-seasons-june-2018-patch

If it still doesn't work I suggest taking out half of your mods and CC and testing the game. Then keep splitting until you find all that is broken.
Either update or remove the broken CC/mods.