Cannot access any server

[Aíka-darkspear]

I don’t know if anyone else is experiencing this issue.
When I login, I get to the server selection screen, and it says population incompatible in red. Every single server shows the same thing. Incompatible.
In all the years I have been playing world of warcraft I have never seen this issue before.
I simply cannot access any server. This is the error code: you have been disconnected (WOW51900223)
EDIT UPDATE: If anyone should get the above error, it’s because your client is incompatible with the latest build of the game. Go into your battlenet client, and check for updates, it will then download the latest version of the game client, and it will resolve the server list from saying incompatible. I actually discovered this fix quite by accident. Normally my client is always up to date but for some reason, it never picked up the latest update.