ClickUp Connection Error in n8n Free: “Authorization failed – please check your credentials”

Questions
1

I’m using an n8n Free account and connecting to ClickUp via an Access Token. It worked the first two times, but after that n8n started showing this error:

“Problem in node ‘Get a list’
Authorization failed - please check your credentials”

I’ve already tried switching to another ClickUp account, but the issue still persists.
However, when I test the same ClickUp connection in Make.com, it works and retrieves data normally.

2

This issue typically occurs when the ClickUp API token expires or is revoked. First, regenerate your ClickUp access token and update it in your n8n credentials. Then, verify that the ClickUp node’s API endpoint matches the correct ClickUp workspace ID. If the problem persists, try clearing n8n’s cache by restarting the instance.