The Sims 3 – Error Message: "serious error occurred".

aifolos  Please see the first post of this master thread:

[Current Issue] Sims 3 "serious error" when loading save | EA Forums - 8322938

Thanks but it is not working :'( i will try install mods or else i dont know what to do

aifolos  Did you try playing in a new admin Windows account?  If not, please do so now.  Make absolutely sure it's a local account, as in, it's not linked to your Microsoft account or any email address.

thank you. for now its working. i only wish i could play it from the same windows account as there is where i have everything else. maybe i will solve it with time :'(

aifolos  That sounds like permissions are broken, to some extent, on the main account.  I have some suggestions here, in a Sims 4 thread for a different error, that deal with permissions:

[CURRENT ISSUE] Sims 4 already running | EA Forums - 11818313

Anchors aren't working on this site yet, so ctrl-F and search for restore , and jump down to "Move or restore location of Documents."  Even if you've moved it out of OneDrive, you can try moving it to yet another new location to try to get around the issue.  The takeown command may also be useful here, and a virus scan would be prudent, just to be on the safe side.

ok i ´will see what i cando.