I have a Series 4 Watch with watchOS 6 attempting to pair to an iPhone X with iOS 13 and whenever the pairing wizard goes to the login screen it crashes and gives me an error: Pairing Failed (Internal Alert): Please file a pepper pairing radar.
Is anyone else seeing this?
Tried hard resetting both devices.
Sometimes you just have to post the question for you to realize the answer.
I think I figured it out. It seems to be an issue with activation lock getting in a weird state. Go into iCloud, "Find my iPhone" and delete your Watch from your account. Then go back and try pairing again. It fixed mine.