An idle timeout in a dx platform 23.2 on-premise setup redirects to an invalid web page, it show DX SaaS on the banner
DX Platform 23.1, 23.2
This problem is related to defect DE585844 and fixed in 23.3 ,24.x releases.
Upgrade to 23.3
Upgrade to 24.1
DX Platform 24.1 Release Notes