OMSA (OpenManage Server Administrator Managed Node) start

Dear All,

OMSA (OpenManage Server Administrator Managed Node) v 9.5.0.1 freshly installed on R330 with Windows Server 2016 with latest updates (Patchday June 08, 2021).

When I lauch the tool from Windows menu, it asks me for user credentials (name and password). After that all I get is the browser message "Diese Seite funktioniert im Moment nicht." (This page is currently nor working).