How do I make a group post for a game that is not listed?

I play mostly car games and I have never made a group post, I was trying to play rocket league because it became free recently

What games do you play? My gamertag is REXOGSOOBWAY currently i'm blocked over a miscommunication, but on the 7th i'm unblocked so if we play the same games i'll be happy to join you.

Okay here is a link from someone who had a similar problem to you in the past https://answers.microsoft.com/en-us...or-group/569625d9-b9c3-41a1-9858-311d3b2285db

Look at what the agent says to do maybe this will help with the problem that you are having, also before going through those steps you should try and reset your console one more time or maybe try seeing if it would work if you posted a group post on a different
game.

Another thing that you could try is getting the xbox app on your phone if you have one and try doing the group post from there if you havent already done that.

Yes i have and it didn't work

I am trying to post a group post to find someone to play with but it says "there was a problem post your looking for a group" plz help i just whant someone to play with

Hello, have you tried restarting your console? if not you should try and see if that works.