Play Offline - Can't login

I tried to log into minecraft launcher and said that I can only play offline I tried to restart my computer several times, I disabled the firewall, uninstalled the launcher, restarted the internet and it didn't work I logged out of the account and logged in again but when I went in it appeared "Sorry ! make sure you are online and try again", i saw on this forum and it is happening with several people, please we need a solution.