WebSphere might not be running, or you might have specified a WebSphere value that does not match the WebSphere native configuration. There are two approaches to troubleshooting this issue.
One approach is to check the configuration of your WebSphere instance.
Ensure that WebSphere is running.
Examine the values for the following installer fields:
WebSphere Virtual Host (PS_IBM_VIRTUAL_HOST in the state file)
Application Server Name (PS_IBM_APPSERV_NAME in the state file)
Use the WebSphere tools to check the configuration to make sure it matches the values you are entering.
Another approach is to create new instances of the WebSphere entities.
Use the adminclient.sh to start the WebSphere console.
Create a new virtual host instance and a new Application Server instance name.
Click the entry under Nodes (typically the host name), and select Regen WebServer Plugin.
This process saves the new entries into the plugin configuration file, which the installer checks for the legal names.
Return to the installer and enter the values you just created.