Unable to access the NitroApp parameters

I use a Nitropad and Nitrokey Storage. My goal is to change the user pin of the Nitrokey Storage. Hence I installed the NitroApp into the Fedora template as explained into the docs.Now, I can start the NitroApp from the Fedora template, but the problem is the NitroApp does not see the Nitrokey Storage as connected. If I click on the app icon in the tray bar, it actually displays “Nitrokey is not connected!”
I tried all the usbs, it dido not change anything. How to solve this issue?
Thanks for your help.