Contacting Server to get Latest Matchmaking PC

Hi,
I keep trying to go online to play multiplayer but keep getting this message:

CONTACTING SERVERS
Contacting server to get latest matchmaking data. Please wait.

I’ve tried reinstalling, restarting, and have waited for an hour. How can I fix this?

https://www.halowaypoint.com/en-us/forums/85d779d52cfd46918b4f8b638f2e3c7b/topics/unable-to-join-matchmaking-pc-steam/0a5ec9de-25fa-4255-8c7e-60172b6f1f38/posts?page=1