I have the same issue with with my 3c NFC using a USB A converter and also with usb c native connection.
I will add the information from the log file:
708 INFO nitrokeyapp.logger Timestamp: 2026-10-08 11:57:11.151368
733 INFO nitrokeyapp.logger OS: uname_result(system=‘Windows’, node=‘Analysis1’, release=‘11’, version=‘10.0.26200’, machine=‘AMD64’)
733 INFO nitrokeyapp.logger Python version: 3.12.10
733 INFO nitrokeyapp.logger nitrokeyapp version: 2.7.1
741 INFO nitrokeyapp.logger nitrokey version: 0.5.0rc2
748 INFO nitrokeyapp.logger cryptography version: 43.0.1
748 INFO nitrokeyapp.logger ecdsa version: n/a
755 INFO nitrokeyapp.logger fido2 version: 2.0.0
4135 INFO nitrokeyapp.gui failed adding device
26573 INFO nitrokeyapp.gui failed adding device
29300 INFO nitrokeyapp.gui failed adding device
32037 INFO nitrokeyapp.gui failed adding device
101299 DEBUG urllib3.connectionpool Starting new HTTPS connection (1): api.github.com:443
101634 DEBUG urllib3.connectionpool https://api.github.com:443 “GET /repos/Nitrokey/nitrokey-app2/releases/latest HTTP/11” 200 1657