Traccar WebGUI 5.9 on iOS

Hello,

so far, I have been accessing the Traccar Server on my iPhone directly via its Webgui. I have now update from 4.X to 5.9.
If I want to check now the device's configuration, I end up with the following GUI:

Maybe, I am just stupid, but I can not manage to choose a device?
Does anybody have a hint?
Regards, Dieter

Have you tried clicking on the menu button?

Thanks, yes.
That is it.
I knew I was being stupid!