Xbox live is not working properly?

I've been playing Minecraft (Bedrock Edition) on my laptop for a while now. For about 4 weeks now I have the problem that I can join other worlds but no one mean. Xbox live data protection, etc. That's not all there's to 'let' on. The invitation button while I host a world does not work! Only the possibility exists via 'friends' in the main menu. But nobody sees that I host a world and yes multiplayer is on.

Have found a solution. Whoever has problems and needs help should write to me.