Unable to join online games

I am not able to join any multiplayer servers. I am playing hypixel. It reads invalid session.

When I clicked the realms section [minecraft built-in], it also reads invalid session. 

It told me to restart launcher and game, but it still didn't work.

I checked that my wifi or network connection is up and other things seems thing.

I am stuck with single player right now.

The first picture below is the minecraft realms, while the second one is for the multiplayer [hypixel].

Thanks