... I was telling him what line to change. You can't just spoon feed people info when they come asking, especially if it is EVERYWHERE in this forum.
You ruined the puzzle for him.
Anyways, the reason it should be changed to 100 instead of 300 is because normal players have the access level of 100. If the min level is 300, then it is obvious why normal players can't join. Just drop it to 100 and you should be fine.