When attempting to connect with the "Cisco Secure Client" app as described in the steps on how to useMillenVPN Native OpenConnect on iOS 15 (iPhone) and how to use Cisco Secure Client on Android, the "Secure Client" error shown in the following image may appear during connection and the connection may fail. Secure Client" error message may appear and the connection may fail.
If the error persists after trying to connect again, try one of the following
1. Use MillenVPN
2. Connect to a different Internet connection and try connecting again with the "Cisco Secure Client" application.