Midi pane or window wont stay open

My midi pane window when i click it it open and closes direct so i am not able to select my devices and others
I use 2 mioxl iconnectivity interfaces with rtp over utp
and other daws work fine but really want cubase to be ok like back on my atari days with no problems .
I use amd threadripper as station
any ideas ?

What do you mean by MIDI pane, can you take a screenshot of that? Are you talking about the MIDI input/output routing pop-up menu in the Inspector? Have you tried using another mouse? You can also select MIDI inputs and outputs using the mouse wheel.

now midi un inspectoe is working but when selecting altiverb got this error