Hi @martin23, I am sorry for the trouble. This error message typically occurs when a trigger can’t register a webhook, but your workflow doesn’t seem to use any webhook-based trigger.
Thanks @martin23! Once adding URLs and values from my own Airtable account to your Trigger node I was able to reproduce the problem.
It seems the formula you are using isn’t recognised by Airtable. Once I delete the formula field, I am able to activate the workflow. Can you confirm this from your side as well?