Could not find a server

i stopped playing for awhile and came back about a week ago. Ever since the only message I get is “could not find a server that was suitable for all members of your fire team”

I’m not playing with anyone just trying to go in solo.

at this point I’ve did a hard reset, uninstalled the game and re downloaded. I’ve reset the modem.

its says this for all playlist social, through customs browser. And even forge.

Ive not had any problems with any others games including MCC, and even Reach.

edit

since no one ever replied I’ve been trying to work this out on my own.

being wired I’ve not had any problems with any other games. I’ve logged into my modem and tried a static ip, tried port forwarding, then port triggering, even dmz.

Still the same problem. So after all failed attempts I thought about a Mobil hotspot. It worked which is funny so the problem is on my end somewhere.

the thing is each time I load the game up I have to connect to my hotspot, then plug back in the wired connection via modem. And as long as I’m playing Halo 5 works perfectly. No problems at all.

Any ideas to what I’m missing in the settings I could change?