This is normal for Cisco Agent Desktop (CAD). CAD minimizes after succesfull logon. If you ask users to look on their task bar below should find the open window minimized they can then open it and make themselves ready or logout etc.
Another way is ask the Supervisors to check their status.
You can post call center related issues in contact center forum for faster response.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.