Unable To Start Dedicated Server

Is something wrong with the servers or is it on my end?

I can access everything in Halo 5, including stats, available boosts, REQ store, customizations, etc. However, every time I try to search for matches, in every playlist (arena and warzone) the same thing happens. The bars at the bottom make it to step 2 of 4 (contacting dedicated server) and after a few seconds I get the message “Unable To Start Dedicated Server. Please try again.”

Closing in favor of this support thread