Failed to log in

Hey.
I can’t access my server. Writes a login error. In a solitary world does not load the skin. I rebooted the router, server, logged out and logged in to the account on the site and in the launcher, changed the versions. I tried to set "online-mode = false" in the settings, but this is how I play for another character and without a skin. There was no such problem yesterday. What is it and how to fix it?
Text from the third picture from the site: "You seem to be offline. Click "Reboot" to try again."
Thank.