Not connecting to Halo 5 Servers??

This has been happening to me for a while now (maybe 1-2 years). I have two Xbox’s and I’m a HUGE FAN of Halo. On my original Xbox one, Halo 5 is completely unplayable. When I select my account, it tells me I can’t connect to your servers, Despite my WiFi being fine and connected. It’s starting to happen on my new Xbox now. Am I banned or something? I’m so confused and troubled. PLEASE HELP!!

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