I fixed it!

1) I closed Electrum

2) I removed the gossip_db and watchtower.db from the electrum folder

3) I edited config to set "run_local_watchtower": false and "use_gossip": false

4) reopened Electrum and re-disabled trampoline routing

Not sure what it was in the above that was stopping the sync, but that's done now, and I'm able to send and receive again.

I did run a local watchtower in an earlier version of Electrum and that option doesn't seem to be available anymore, so maybe something there?

Thanks for your prompt response, jackg!

I've been leaving it running, though it has been closed to update Electrum. Is there a way to force a rebuild?

I don't believe I'm connected via tor, unless this is the default. I can't seem to find any option to select tor either way.

When attempting to make a lightning payment, I get the error "Exception('channelDB data not loaded yet!')".

Receiving lightning deposits through this channel work fine.

My lightning node information does say "connected to 0 peers", in case that is a related issue? And the % next to the lightning icon is "??%".

I'm running Electrum 4.1.2 with trampoline routing disabled as I opened this channel before trampoline routing was a feature. My channel worked fine before 4.1.

Does anyone have any suggestions on what to try?