HisKoalaBear As a test, please try playing in a clean user folder. Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop. When you launch the game, a clean folder will spawn with no content. (Your saves and other content will be intact in the folder you've moved but temporarily unread by the game.) Don't add anything to the new folder yet; just start a new save and see how the Gallery behaves.
When you're done testing, you can trash the new Sims 4 folder and restore the old one, and your saves and other user data will be restored too.
If the Gallery causes a crash with the new user folder, do you have the ability to test with a different connection? For example, you could set your phone as a mobile hotspot, using data rather than your home wifi, and connect to that, provided your computer supports wifi at all.
