Hey everyone,

I’m new to n8n and Railway, and I need help!

I deployed n8n on Railway.

However, when I try to add the credentials in n8n to use a Google Sheets node, I get stuck. I entered the Client ID and Client Secret, clicked Sign In, granted all permissions, and clicked Allow. But instead of redirecting me back to n8n, I get this error:

Error 400

I think the problem might be related to domain/URL settings in Railway, but I have no clue how to fix it. Do I need to set up custom domains or change something in Google Cloud settings?

PLEASE HELP!