I getting "login failing and invalid session". Usually I can launch launcher without re-login and join online multi-server but now I need re-login per launch launcher and cannot connect any multi-play server. I tried to re-install launcher, get directly minecraft.exe, and restart my network router, but there are not effective anythings. What I should do?

:Infrequency, I cannot login launcher but I can login "mojang.com".