Problem/Bug SunCertPathBuilderExeption

Dear Bukkiters Reading This,
It Is Come To My Attention That My Minecraft Launcher Don't Wanna Start Again In The Past,
If I Tried To Log In To My Account It Said:"(SunCertPathBuilderException: unable to find valid certification path to requested target)"! I Have Made A Screen Shot And Pasted Here(i blurred my e-mail )

I Have Tried To Do:set my firewall off,reinstall java and minecraft,...
If You Got A Fix/Way To Fix It;Be Sure To Say It Down Below!

-CoolKarate404