[Mathemagics]

So the problem is that when I try to join a Halo CE server this message pops up:

ATTENTION:
Could not join this server. There may be connection issues.

The wierd thing isn't the message itself, I don't know if it's a general problem or not but when I try to join (most) servers this happens, and I ignored it for some time but now it's pretty irritating. I know the message describes pretty well the problem but I find it hard to believe it has anything to do with my connection since it happens on wayyyyy too many servers...
If anyone knows how to fix or can explain me the issue I would gladly appreciate it