The loading error appears when I try to load the game that's on a residential rental lot. Though I am not sure if its just the residential lot or if it is the new For Rent world as a whole. I was able to load one of my older games but still had another last exception error appear in the sims 4 folder but this one did not get in the way of game play (I have attached it just in case it part of a bigger issue).
My main issue though still seems to be with the new expansion pack.
When I took my mods and cc out I still had the same problems
It does seem to be a corrupt ladder
You will need either TwistedMexi's AllCheats mod or MC Command Center (probably cheat module, not sure)
Try the following steps
That said, you also have the high rent bug: https://answers.ea.com/t5/Bug-Reports/OPEN-FR-Impossibly-High-Rent/td-p/13288458/jump-to/first-unread-message
Still trying to figure out a permanent fix for that. Found some steps but they seem to not work all the time.
