For anyone in future chasing the fix to the Fernet key error – I traced through the code back to where it opens the server-conf.json file. The PYSRV_CRYPT_KEY value was empty – this was because I didn’t have python3 available in the host machine where I installed the docker container and the script uses python3 on the host to randomly generate this key.
I generated a key put it in the server-conf.json file, restarted the container and I can scan in devices now.
