Apple Watch shortcut to Trello fails with access error

I have a shortcut on my phone that adds a card to Trello. Works fine.

When I try to run it from my watch it initially appears to work (captures text as expected) but then I get an error saying:

Could not run "Add Trello Card"

Shortcuts does not have access to your Trello account.

What I’ve tried:

• Restart my phone.
• Restart the Trello app.
• Update the Trello app.
• Log out and back in to Trello on my phone.
• Create a new shortcut that adds a card to Trello.
• Made sure ‘show in Apple Watch’ is enabled for the shortcut.
• Made sure ‘Allow this shortcut to access Trello’ is enabled for the shortcut.
• Deauthorised the Shortcuts app from my Trello account (on the website), then re authorised it by running the shortcut on my phone.

None of this fixed the issue.

Does anyone know how to fix this?