Re: Sims 4 saves disappeared and cannot access the gallery
@xxaimeerlxx It sounds like you may have loaded the Legacy Edition, which has no Gallery access and uses the original loading screen. The easiest way to fix this is through Origin, so please see if you can reinstall and run it. There's no need to uninstall the EA App; just don't try to run both at the same time.
Within Origin, open your game library, right-click on the Sims 4 icon, and select Repair. Then right-click the icon again and choose Game Properties > Advanced Launch Options, then choose 64-bit from the dropdown menu. Before trying to play, set an exception in your antivirus for TS4_x64.exe.
If you can't run Origin, you can repair through the EA App instead: open My Collection, hover over the Sims 4 icon, click the three dots, and select Repair. There's no way to choose the 64-bit version of the game within the App though.
If the above doesn't help, please let me know what antivirus you use.