Can you confirm your LAN network is in fact 192.168.1.0/24? What's the IP address on the machine you're currently using?
You can try to set the LAN_NETWORK to 0.0.0.0/0 and confirm that the traffic isn't being blocked. That'll verify that the issue is with your setting of that environmental variable. Then you'll need to figure out your docker network address + subnet and include that in the LAN_NETWORK variable. Here is what mine looks like but I have multiple networks and run my containers on a kubernetes cluster, so yours will likely need to differ as well:
192.168.1.0/24,192.168.0.0/24,10.253.0.0/24,10.32.0.0/12
The issue is not related to the ADDITIONAL_PORTS variable. Those were actually removed from binhex's containers and are no longer documented in his github Readmes.