I have this problem. In a nutshell, companion and desktop on other machines in my network cannot access the daemon’s API running on my NAS. I can ping the NAS, and the IPFS daemon is working fine (people are downloading my files), but I can’t get the UIs / clients to connect to the node.
When running a native node on those devices, e.g. the desktop IPFS on the laptop and PC runs its own built in node, it works fine. So it’s just the remote access to an in-LAN node that’s failing. One machine is wired into the same router connecting to the NAS, the other is on Wifi, so it’s not a subnet / wifi-extender issue either.