I cant log in to Minecraft. It says "Unable to connect to server"

Hello. I bought Minecraft from "minecraft.net" about 6 months ago.

When i wanted to log in on minecraft.net and pressed the "login" button, nothing happened.

In the Minecraft Launcher when i press the "login" button it says: "Unable to connect to server"

Could someone please help me?

 

Thanks!

 

And i dont know if it matters, but ive used "SKLauncher and Shiginima Launcher" before. (Minecraft Launchers)