Game previews not working for Xbox one

It didn't work I think it's got something to do with the preview program due to the latest update I got on my Xbox one that was sent with me being in the preview program that is causing the issue... My roommate doesn't have an issue on his Xbox one with
backwards compatible games and he isn't in the preview program

I got the new update, the friends list and party chat are different. I was trying to get into the forum for the preview but I couldn't.

Only problem I am having is that i can't connect to a party chat with anyone who doesn't have the update as well...aka all my friends. It won't let me join their parties and they can't join mine as well.

You receive the Update early.

You can only wait

I turned on my xbox and I got the update when I registered a while ago, but now I can't view my friends, or my messages. Idk what's happening

Same here! been trying to access the preview update forum for the past four days...keep getting 'Group not Found' on multiple devices, and multiple browsers on each of those devices....Update is great but without access to the correct forum I can neither
give feedback or invite others to beta test