Multi-user editing NOT working on LAN [4.23]

I am trying to work on a project with my brother so we decided to create it on 4.23 as it has the new multi-user editing plugin. We use the same internet and are not using ethernet. I can launch a server but it does not appear for my brother, i did the same and i have the same problem. I did everything on the UE4 forum which takes you to step by step on setting up a lan server, but it still doesn’t work. Please help.

I can’t seem to get this to work on LAN or internet. Tried every possible combination of ports, IP’s, IPv4’s; Nothing seems to work at all. I’ve port forwarded as well.