Can't update series 4 watch: claims it's not connected to the internet, but it is
I recently purchased a series 4 watch from a friend. She unpaired it, and now I'm trying to pair it with my phone. I bring my phone near the watch and pairing starts. I hold up the phone camera to the swirling pattern and it says it (I assume the watch) needs to download an update. I say OK. Then I get a message on the phone that says that it's not connected to the internet. I tested phone, it is, in fact I just updated to phone os 14.2. Tried multiple times with same result. Occasionally it would hang saying "checking for updates" for hours.
Suggestions?