You’re running into this because that node is referencing a credentialId, but no Custom Credential has actually been created or linked yet so the system expects a UUID and gets nothing. I’ve seen this exact issue before. The fix is usually: Create the Custom Credential first in the dashboard Make sure the node is pointing to that credential (UUID auto-fills) Re-save the workflow after reconnecting the tool If you want, I can walk you through it step by step and help you get it sorted quickly. Happy to take a look 👍