So I've noticed that people have a hard time joining my game and sometimes I can't invite people to my games on xbox. When I go to their profile and go into the invite tab the invite to game option is grayed out. I figure this is an issue with my router's firewall most likely. How do I fix this problem?

There’re a dozen of reasons why this could be happening, one of those being that you’re interacting with a player on a different region since you cannot manually select regions like PC.

If you have a firewall on your router though do disable that as that could cause a lot of problems for your devices.

Oh thank you! I didn't even think about the different server regions. I've had to abandon killing dclone twice because I can't kill him, and I can't figure out how to get someone in my game to help me out. I'll be more specific in my topics and try to find someone who's in North America

Note that if they’re on let’s say Korea and you’re on the US server they can still join your game, there’re no join restrictions.

The only downside is that there’ll be a lot of lag…