Can't Play matchmaking, "Dedicated Server Problem"

I can’t play matchmaking games. When I try to play, loading map is at 0%, then it says “there was a problem with dedicated servers” and nothing helps at all. Restarting, cache clearing, resetting network, reinstall nothing works. Any idea anyone?
Can’t play anything matchmaking…even customs. (Offline customs work fine)


Same issue here. Have tried Port Forwarding. Changing textures (map loads fine solo). Reset modems/routers.

Opened a ticket with support and got no help. I feel like everyone I know can play fine.

Swap to an alt port and restart

After disabling and enabling my network interface in network settings it worked.

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Can someone explain a solution if anyone find it please?
I can’t play and halo support just told me to wait while a temporary event is going, so frustating