I need help with this error. ERROR REPORTED BY - OAuth 2.0 Playground Error: Insufficient parameters for OAuth2 callback. More details: Received following query parameters: {} Failed to connect. The window can be closed now.

I'm using the n8n opensource, a repository on GitHub and hosted on the Railway server. In the Workflow dashboard, when I try to connect the credential to the Google Contacts - Get All node, it returns the error below.

ERROR REPORTED BY - n8n Error: Client authentication failed (e.g., unknown client, no client authentication included, or unsupported authentication method). More details: Failed to connect. The window can be closed now.

Why does this happen? Could you please help me with this error?