When I try to start secion in minecraft I get this: "Sorry, but couldn´t connect to our servers. Please make sure that you are oonline and that Minecraft is not blocked"

Good afternoon , I have premium account for some time now , but today I came this: "Sorry , but couldn't connect to our servers Please make sure that you ' are online and That Minecraft is not blocked . " . would like to know to do, since I me meto on page of Minecraft or of Mojang and agree without problems , I get that my account is secure and everything correct, but when I run the launcher to run the game I get that. What should I do ?

My username is JASJ0550

I hope you help me