Avatars not rendering on Quest 2

I am currently building a Unity Application for the Quest 2 that should include Avatars.

I have setup everything in the project to make in run successfully in the Unity Editor aswell as the Meta XR Simulator.

Only when I deploy the App to the Quest 2 though, no Avatar renders. I tried with the fallback Avatars aswell as loading the users Avatar after setting up all the Data Usage Permissions for the project, but regardless which Test Scene I use, no Avatar will show on the device. I updated the System Software to 71.0.

I am currently using Unity 2022.3.52 with Avatar SDK 31.0 and Meta SDK 71.0. I tried downgrading to various older versions with no success already.

Did anyone encounter this issue before or knows of any setting I am missing? I setup a fresh project already with only the two SDKs mentioned above.