I'm having a problem with my Aternos Server

Hello,

I just recently made an aternos server and just got it running tonight, however whenever I try to join my server it gives me the "You are not invited to play on this world" message. I was just wondering if there is anything I can do to fix this as it's my own server, and when I look in the My Servers tab I can see the server, it was online and the port was correct.

Thank you, I did that. But now it giives me the "Unable to connect to this world" error.