I am creating a Google ID but I am getting this error when connecting the nodes to my Google account.
“Error: Client authentication failed (e.g., unknown client, no client authentication included, or unsupported authentication method).
{"error":"invalid_client","error_description":"Unauthorized"}
Failed to connect. The window can be closed now.”
This error typically occurs when there’s a mismatch between your Google OAuth credentials and n8n settings. Here’s how to fix it:
• Double-check that your **Redirect URI** in your Google Cloud Console exactly matches the one shown in your n8n Google credentials (usually something like `https://your-n8n-instance.com/rest/oauth2-credential/callback\`)
• Verify your **Client ID** and **Client Secret** are correctly copied from Google Cloud Console to n8n without any extra spaces
• Make sure your Google Cloud project has the necessary APIs enabled (like Google Sheets API, Drive API, etc.)
• If you’re using n8n cloud, ensure you’re using the correct redirect URI format for cloud instances
The most common cause is the redirect URI mismatch, so start there first!
Hi, I’m actually having this same issue being in a self hosted env. I finally found my way to this post and have tried said remedies to no solution to completion this did get me a step closer ( Went from 403 error ) to the shared error from above. hoping to get help on this last step. Thanks!
Make sure the type of ouath id is a web application, and that the URI is correct. Ensure your google cloud project is published, not in test mode also. Ensure the corret api’s are enabled on your cloud project.
Hi! Just wanted to say thanks for aking he time to respond and help randos on the internet.
After starting a completely new google project and everything else that ensues, it works.
idkwtf changed. I have followed your (and a dozen others) advice. but that works. computers huh. anyway Thanks!
Nice! Good Job! Since you solved it, you can mark your reply as a solution so the post begins the closing process!