Serviio Visibility Issue on Some Devices – Looking for

Hello everyone,
I have been using Serviio for a while and I’m facing an issue where the server is not visible on some devices on my network. I’ve already checked this tutorial (https://www.france-tutos.com/serviio/) which is very well done, but despite that, I still haven’t been able to fix the problem.
Does anyone have any advice or similar experience? Thanks in advance!

[atc98092]

Are the devices that cannot see Serviio connected via WiFi? Many WiFi access points/routers have a security setting that does not allow connected devices from seeing anything else on the network. It only allows Internet access, but blocks everything internal to the network.

Do you have any VLANs, or any other networking tricks on your home network? DLNA is only capable of being accessed on a single network segment unless there's some fancy routing rules in place between segments.