Unauthorized Client Error When Accessing the Web Console
Overview
The following error may appear when accessing the Login Enterprise web interface.
"Sorry, there was an error : unauthorized_client"

Solution
To resolve this issue, add the Appliance URL to the allowed URLs list. For this:
Console or SSH into the Appliance.
From the Maintenance Menu, select Systems > Change allowed URLs. Each URL should be separated by a semi-colon ";".
For more detailed steps, see Changing Allowed URLs.