Etsy refused a stock update from Shuttle. Etsy no longer accepts Shuttle's connection to your shop.
Why it happens
Etsy stopped accepting Shuttle's connection. Your shop can still look connected in Shuttle when this happens. If you see no warning next to your shop, that does not rule this out.
How to fix it
In Shuttle, go to Settings, then Account, then Connected Shops.
Under Etsy shops, find your shop.
If it shows Reconnect needed, click Reconnect, then Connect to Etsy. Confirm access on Etsy.
If it shows no warning, click Add Etsy shop, then Connect to Etsy. Sign in to the Etsy account that owns the same shop. Shuttle refreshes the shop you already have instead of adding a second one, and makes it your active shop.
The next stock sync uses the new connection.
Still seeing it?
Contact support if:
the error comes back after you reconnect, or
you do not see the Add Etsy shop button. If your plan includes only one connected Etsy shop, the button is hidden once a shop is connected.
