lsusb sees it ok, That is good something is happening when I plug it in.
Bus 001 Device 008: ID 20a0:4108 Clay Logic
The other thing I noticed is that on the ubuntu machine which it works on, the nitrokey icon appears in the system tray when I start the application even before I insert the key.
However, in the centos8 maching it does not. The difference being on ubuntu i installed it using PPA but with CentOS I used Flatpak.
I took Flatpak off and put it back on again in case that was an issue. There does not appear to be any other straight forward way to get it operational on centos8. There does not appear to be any rpm package.
reveals nothing on either the ubuntu machine where it is working or on the centos machine so I guess that command is not valid for this situation.