Why can’t I start or join a party?

Believe this is an issues on Xbox's end. I'm seeing a few people report. You'll most likely need to wait for a fix. If your NAT type is strict it also could be that as well.

The same thing is happening to me. It started two days ago And it wont let me join other people or start a party

hello SixDollaWarrior. it be that the Internet connection between your Xbox console and the other party members is failing. This is usually caused by a connectivity
issue between you and the host. Occasionally, it indicates a conflict in the NAT type used by you and the host.
it could also just be a bug. if its a bug you need to give a bet and it will fix it self.

Hey umm one more question does the suspension mean I can’t talk with people in the game or I can’t start or join a party

Hello Ava M, My name is David. I am an independent advisor, happy to help you today.

I'm sorry you're going through this.
Please note that some party features on Xbox, such as joining or starting a party, may require an Xbox Live Gold subscription. Verify that your subscription is active and in good standing. If you do not have an active subscription, you may need to renew your subscription to access these features.

Certain privacy and security settings on your Xbox account may be preventing you from joining parties or starting a party. Go to the privacy settings on your Xbox account and verify that it is set to allow party features.

Best regards.