This issue has been happening to me recently too- it’s not something with my code or anything. For some reason it extends beyond studio too, I can’t play games without having an authentication error and when I try to use studio I end up with an “HttpError: Timedout” prompt or studio just never loads.
Solutions i’ve tried
Restarting my pc
Uninstalling / Reinstalling roblox + wiping local roblox folder
Resetting my pc
I don’t have any issues with my internet because I’m able to load other websites and play other games outside Roblox just fine.
I’m unsure what is causing this, if anyone could PLEASE leave some sort of solution that would be appreciated