Having trouble connecting my Clickup credentials to n8n

Questions
1

Hi,

I’m having trouble trying to connect my Clickup workspace to my n8n using OAuth2 API.

Here is a screenshot of me trying to select the desired workspace, after loggin in with my credentials, there is just a message that says there has been a problem:

Snímek obrazovky 2025-12-23 v 10.14.54
Snímek obrazovky 2025-12-23 v 10.14.541920×979 46.4 KB

And here is a screenshot that proves that I actually CAN log into my workspace, so there cannot be a problem with the credentials. (this is what happens after i click “Cancel” in the last screenshot):

Snímek obrazovky 2025-12-23 v 10.15.11
Snímek obrazovky 2025-12-23 v 10.15.111920×1049 67.5 KB

Couple of months ago I was using these same credentials to link my clickup workspace with my n8n no problem… Than I removed them and tried to apply them again, and since than I am unable to log in, and I keep getting this same message. Also my coworker tried it with her credentials, and she is getting the exact same problem.

2

This sounds like the OAuth app might’ve been revoked or disabled in your Clickup workspace settings. Go to your Clickup settings and check under integrations or API to see if the n8n OAuth app is still authorized there. Sometimes when you remove credentials and add them back, the app permissions get messed up on Clickups side. You might need to completley revoke the app in Clickup first, then go back to n8n and create a fresh OAuth connection. Also worth checking if your Clickup plan still supports API access, because sometimes plan changes can affect that