"Unknown Error Encountered" on Login Page.

An unknown error has been encountered page is displayed instead of the login page. This KB article will help you with a solution to fix this error.

Analysis

There are multiple issues that could lead to this error.

1.  Network connectivity issue

   
   This issue can occur due to network connectivity problems, such as loss of internet connection, DNS resolution failures, firewall restrictions, or issues with the server hosting the API.
   

   Solution

   Check the network connection and ensure there are no connectivity problems. Verify that you can access the internet and communicate with the Zmanda server.

2. Backend Services are not working

   This issue can occur if the backend service is not working. Run the following command and ensure that the service is running.

   setup-zmc

   Solution

   If you observe any service in an inactive state in the output of the setup command, then restart the service manually using systemctl. In the example given below, we are restarting the zmc-rest service.

   sudo systemctl restart __sub-zmc-rest.service