Troubleshooting: Redirect_uri does not match client settings
Problem:
On occasion, you may experience an error in Canvas Badges/Credentials. If you encounter the following error, it's likely your Canvas admin needs to create a developer key to connect to the specified Canvas Credentials server.
while(1);{"error":"invalid_request","error_description":"redirect_uri does not match client settings"}
This issue typically applies to self-hosted instances of Canvas.
Solution:
If creating a developer key does not resolve the issue, then our support team may need to update your integration settings with the new developer key and secret.
Finding the developer key
The developer key can be found at the root of your Canvas instance and may require admin access.

The key typically has 64 characters. When you share it with the support team, please ensure you have copied the entire string.