The following documentation outlines how to initialize the OAG Admin UI Console for the first time:

• Initialize the Access Gateway Admin UI console 

After following these steps and setting the cookie domains, OAG will redirect to the admin endpoint to log back in.

In the case of this issue, at this point instead of the login page, OAG displays a "System Error" with Tracking ID. The error indicates "An unexpected error occurred. This error has been logged." with no further details.

Other potential observations:

• When monitoring OAG Logs via Management Console, errors can be seen such as:

or 
 

• When checking the OAG's Trusted Domains via Management Console, no entries are displayed.

• Okta Access Gateway (OAG)

As noted in the documentation, OAG does not allow using upper case when setting the OAG domains. The issue described here is the result of using upper case in the domain.

1. Reset the OAG appliance via Management Console per the following documentation: Here  
2. Go through the Admin UI initialization steps again, making sure to use lowercase in the domain settings per the following documentation: Here

Related References

• Initialize the Access Gateway Admin UI console
• System menu