Enforcement Page

Try checking your email associated with your xbox account. Usually if your suspended they notify you through email on their reason. Try keeping it positive when messaging players. Anything inappropriate can get you suspended. If this was your first warning
you should only be suspended for the next 24 hours. Hope this helps.

They're working on a fix, but there's been no official word on an ETA.

It might be a server problem that you can't see what you're banned for, but itll probably be over by the end of the day

You should receive a message from the enforcement team which states the reason for your suspension. You can appeal the decision by visiting the enforcement page. They don't
hand out suspensions for no reason, so you must have done something. Even if you thought it was nothing, they must have felt it violated the Code of Conduct.

Try going to the Microsoft support page and see if that helps.