GetLoggedInUser() Returns null for username and 0 for ID

As such I am unable to use many of the meta abilities, like Shared Spatial Anchors in my instance. The worst thing is that the app was working fine on my headset until I tried it again on 11/8/23. I have the User Profile and User ID permissions active in the app manager, and the correct app ID is in my build (never changed it). I have also uploaded a build of the app to the alpha release channel, and added my account as a user in the app manager, all to no avail.
I have no idea what else to do at this point. I can't believe meta would treat us devs like this haha. I have contacted their support team and they turned me away. All we have is eachother it seems.