Can't use Calendly Trigger in Automations

I am unable to use the Calendly Trigger in Automations, as I consistently receive the error message: “Unable to verify the connection.”

Here is what I have tried so far:

  • Deleting the trigger and re-adding it.
  • Creating a completely new automation.
  • Testing both available Calendly trigger options — the issue persists regardless of which one I use.

Calendly itself seems to be functioning correctly on the account level; appointment synchronization is working without any issues. When reviewing the logs, I can see that data is being transmitted. However, the trigger cannot be used.

The problem appears to be connected to the following GET request:
https://xxxxxxx.activehosted.com/api/3/integrationLayer/connections/verify?app_version=xxxxxxxx

This request returns a 400 Bad Request status code.

Our team may need to look into your account specifically to help. Have you already opened a support ticket?

Yes, here is the ticket number: 9920302
Unfortunately, I have not yet received any help with this urgent problem, so I have tried my luck here in the community… :weary: