"You are not white-listed on this server"

I have been using Aternos for 4 days now, and while I find it a great site to help people play with their friends privately, I've already run into a big issue. Starting today I've noticed that every time I start my server and attempt to join, I'm greeted with this message despite having white-listed and op'd myself. Even once I turn off white-listing, it gives me the same message. If anyone knows the fix to this, let me know. Thanks.

Here's some info in case it helps:

-I'm using version 1.14.2 (server is set to same version)

-A total of 7 people have had access to the server (including myself)

-I have white-listed and op'd my account

-I currently have White-list, Command Blocks, and Cracked enabled in the Options tab

-I cannot make it public because I've been streaming my server often (and accidentally leaked the ip) and don't want random viewers joining.

Aye, thanks for fixing it, but there are still problems... A lot of my friends were having white-listing problems while trying to connect. When I turned white-listing off we were all able to connect, but we lost all of our items and our skins do not display.