I'm having trouble syncing; I'm using Linux Ubuntu 22.04. When I try to sync, it shows the following message: "Your Anki client does not support the new timezone handling yet. Please ensure your Anki is up to date."
You’re probably using a very ancient version from your package manager. Please try the official builds from https://apps.ankiweb.net/
Note: if you have trouble getting the latest stable to run on Ubuntu 22.04, you can try the new beta, which is known to work there: