Don't Install If You Use Android Pay
If you prefer to use Google's Android Pay over Samsung Pay, you'll want to avoid the Galaxy S8 Android 8.0 Oreo beta.
Samsung Pay appears to be working normally for most Galaxy S8 and Galaxy S8+ users testing the Android 8.0 Oreo beta. Samsung recently updated the software to work with Android Oreo.
However, Google's payment solution is completely broken on Galaxy S8 devices running the Android 8.0 Oreo beta.
There aren't any known workarounds (other than using Samsung Pay) and we don't expect the service to ever be compatible with the Galaxy S8 beta.