You blocked my account and now I can't play Forza Horizon 5 and I can't change my account,...

Problem solved, I created a new account on microsoft store and xbox app and games Forza Horizon 5 are now running smoothly. I can't use my main account anymore for some reason, but as long as the game runs smoothly it's fine. Thanks for your atention.

I tried other browsers but it didn't help. I want to change settings in my xbox live account because in Forza Horizon 4 I can't see players's car designs. I get message like:"This function blocked in parental's control settigs". But I didnt set on this
setting and my parents didnt set on this setting because they dont have microsoft account.

You know what is weird,

I used to play Forza Horizon 4 on my computer with my brother account. Multiplayer worked fine.

As he got his own PC now, I have created my own Microsoft account and bought the ultimate version of the game.

It seems linked to the change of account and my new GamerTag as I didn't change anything on my computer or my router.

Also, switching to my brother account on my computer is fine, multiplayer works.

I presume it has to do with my new account but please help me, I have paid 100 euros and can't play online.

I have tried to post this twice on the forza Motorsport forum but it says an Admin must check the post before and each time I can't see it. It is like they are refusing to display my need of assistance. Also my ticket at the support is open for 12 days
now without any reply.

I found that I can't sync, get my old data back. But, I found a way to get the forza horizon 4 in my second account! In Microsoft store it says that I can play forza horizon 4,or buy to my own. Does this mean that I have to buy the game? I think no.

For example I have downloaded Forza Horizon 5 but can't play it on the cloud. But can play Forza 4 on cloud