Couldn't find a suitable server

Hello there,

For about half a year I’ve had problems with playing Halo 5 multiplayer, but i was unable to find an answer to my problem.

My problem is that when I want to play multiplayer I get the message: “ATTENTION: Could not find a server that was suitable for all members of your fireteam.”

However, I am only me. No one else in my fireteam. It happens on all the multiplayer lobbies except custom game. It appeared without me changing any settings. I have tried both with Ethernet cable and with WLAN. I connect just fine on other games (Need For Speed, Just Cause 3, Star Wars Battlefront). I have, of course, tried restarting, since it happened a while back.

TL;DR
I get an error saying: “ATTENTION: Could not find a server that was suitable for all members of your fireteam.”, when i want to play multiplayer, and there is no obvious reason as to why or how to fix it.

Any help is appreciated!
Thanks!

Are you on satellite internet like DirectTV or Dish?

Update: Running Halo 5 on my phone’s mobile hotspot, using mobile data, seems to solve the problem, however running on my family’s router/modem doesn’t work.

> 2533274795739611;2:
> Are you on satellite internet like DirectTV or Dish?

Nope. I’m on an optical fibre connection.
Btw, thanks!