When clicking the link in this tweet: https://twitter.com/Everleap/status/851831120152985603 I get the attached message on my Android phone. Interestingly, it doesn't occur on PC.
Yeah, I see that on Android too. I suspect it may have to do with the shortened URL, I'll poke around and see if I can find anything. The cert is fine, it's the same cert across the domain, and links to the Everleap blog from Twitter don't trigger that message...weird.
Perhaps it's related to the "Incomplete Chain": https://www.ssllabs.com/ssltest/analyze.html?d=forum.everleap.com You should also look into fixing several of those other issues listed in that report.