Your Connection Isn't Private.

Hello,  When I try to publish a page from my website I am getting a message coming up saying that "Your Connection Isn't Private. Attackers might be trying to steal your information from hstrial -----.homestead.com.  Why is this happening when I thought I was working within the safety of https//homestead.com  Also when I logout from my site I am getting this message on the screen   "This page isn't working right now status.homestead.com didn't send any data."  Can someone please help me out.  Regards.