Hi Pete, the Tuya integration seems to be working fine across the board. I can see a lot of successful requests going from other accounts.
It looks like the authentication token for your account may not have refreshed correctly. Can you try unlinking then linking your Tuya account again? You can do this via the services page. This won't impact any of your sequences - once you've linked your account again the devices will be refresh and your existing sequences will continue to work.