I searched the forum for a part of the error and found this thread:
IpCamera Discovery error - Setup, Configuration and Use / Installation - openHAB Community
1 user also with Docker, another I will have to assume does not use Docker as they use openhabian.
I have a USB network card laying around so I can try adding it to mine and see if I can reproduce the error. It may be a rights issue accessing the network card. This is certainly not my strong area but I suspect it has nothing to do with the cameras and more to do with accessing the NIC network cards.