Can issues with the network itself (router, cables) cause error 0x00000bcb, and what checks can be performed?

Yes, network issues can definitely cause this error. Ensure your router is functioning correctly and is powered on. If using Ethernet, try a different network cable or port on the router. For Wi-Fi, ensure the printer is within range of the router and that there are no other devices causing interference. Restarting your router can also resolve temporary network glitches.