My minecraft dosent work! Mineplex?

Hi! My mineplex worked few days ago, But starting yesterday I tired to go on mineplex but it said "Can't resolve hostname." I did spell everything right. And there's no error, For the server, I use us.mineplex.com, and I searched up on google why mineplex dose not work and nothing really appeared up, btw I'm a macbook pro user.

Sometimes if you are logged in else where, it will notice and not let you log in until you're logged out elsewhere. It happened to me once when I logged into minecraft on two computers at once.

How do you work mineplex

You should just get a life

I had this problem myself you have to delete all your servers wait 5 minutes refresh and redownload your servers

Mine says outdated client, I don't know what to do 0_0
I keep on tapping it, and it says that or disconnected from server