Hi @yen,

The error suggests that the Managed Server is down. You can use the scripts located in \\<IFS_HOME>\instance\<InstanceID>\bin directory to check the server status and stop/start them. Doing an orderly restart of the servers could solve the issue in most cases. 

You can run the scripts in following order.

• check_server_status.cmd - to check the status of each server prior to the restart.
• stop_all_servers.cmd
• stop_ as_nodemanager.cmd
• stop_http_nodemanager.cmd
• start_http_nodemanager.cmd
• start_as_nodemanager.cmd
• start_all_servers.cmd
• check_server_status.cmd - to check the status of each server after the restart.

If all the servers (Admin Server, managed Server(s), Http Server(s)) are in running state, you can see if you can successfully login. 

If above steps do not solve the issue, it would take some more troubleshooting to check why the servers are not starting up or throwing errors by analyzing log files. 

Hope this helps!

@Charith Epitawatta thank you for your help.