Re: the requested operation requires elevation of privileges
@ReynaValdez and @lstlfiregaming Please check whether you've set Sims 4 to run as an admin. Right-click its desktop shortcut and select Properties. The option would be there, and if it's present, please disable it.
If this doesn't help, please check both TS4_x64 and TS4_DX9_x64 within the game's program files. They'll be here:
[install location]\The Sims 4\Game\Bin
@ReynaValdez Please remove the -dx11 command line argument as well. It shouldn't be necessary and might complicate troubleshooting further.