Won’t let me post a group post

I've found for you a reddit thread that details the same issues that may have an answer for why you're having issues. The most likely answer could be social feature outages could be going on/your console is having issues communicating information over Xbox
Live via the internet. Try to restart the console and maybe your router to see if that helps.

Here's the reddit link.

https://www.reddit.com/r/xboxone/comments/7e2yhd/looking_for_group_not_working/

You could also check this out for more information about the various features of the LFG's on Xbox. One of them is bound to have a common issues page. https://support.xbox.com/en-US/browse/xbox-one/xbox-live/Clubs and Looking for Group

And for future reference here's the Xbox Live service outages page. Currently everything is up, so the issue is most likely on your internet's end.

https://beta.support.xbox.com/xbox-live-status

Hey Matt!

Nice to meet you! I'm Darhyl, a fellow gamer. I'm sorry you are experiencing this. I am here to help.

If I may ask, may I know which platform device are you using to do a group post, is it on the Xbox console or Xbox app?

Also, is this the first time that this error has occurred?

Hi there Will! Christopher here, an Xbox fan and been on Xbox for years already. I would really love to make your day by helping you out. Let's try the following!

Open the Xbox Guide by pressing the guide button on the controller and select

Settings.

Select Network Settings.

Select Advanced Settings.

Under Change Settings select Alternate MAC Address.

Select Clear.

Ok, so have you checked your account on http://enforcement.xbox.com That would be the place it would show and suspensions you may have....

It is an issue for everybody at the moment.