Revocation information for the security certificate for this site is not available?

Revocation information for the security certificate for this site is not available. Do you want to proceed?

I get this and would LOVE to know how to get rid of it. As well as how do you place auto attack back on? Or if it's possible. I've been a summoner for years and am completely loyal as well as a proper "league community" mentality. Just thought I'd toss this out to see what I can do for these issues... even they are not, just would like to be much more effective as a team mate! Thank you all in advance. Add me as well if you would like a non-raging team mate that can fill any lane friends!

Sincerely, Stailious (Summoner's Name)