Same issue, Pixel 8 Pro, Android Beta, ChatGPT Beta, Unable to log in to the app. This is the same behavior I see when loading ChatGPT on a custom ROM / Waydroid. If I had to guess the framework is too new for the app, and that security function doesn’t trust the the device thumbprint. This is frustrating beyond words. Been using Chrome in desktop mode, so voice is available, but it hurt performance a bit.
Edit: Now web doesn’t work.