Halo 5 Local Server app compatibility?

Maybe this isn’t the right place to post this, but I wasn’t sure where else to go. I recently got an Xbox Series S, and I really wanted to do a Halo 5 LAN party with a couple of my coworkers and friends. Between all of us, I knew we’d have enough Xbox Ones and Xbox Series consoles to get some 4v4 customs going. So, I downloaded the Halo 5: Guardians Local Server app and connected my Xbox One. However, when I tried to find the server with my Xbox Series S, the server wouldn’t show up no matter what I tried. Is the Halo 5: Guardians Local Server app not compatible with the Xbox Series systems (thus requiring Xbox Live Gold to play,) or am I missing something?