Can not connect in Servers like Hypixel

I am playing 1.7.10 Minecraft Version. Every time that i am trying to go to a server (for example Hypixel, HiveMC, etc.) my screen says login..... and then: Failed to login: The authetication are currently down for maintenance. Please fix this bug.

P.S. When I open Minecraft I can't see the Minecraft Realms Button! And this bug also exists to my friend's computer.