There is a problem with the SSL certificate from the website. It expired over two weeks ago. Maybe you should fix that, because it sends a pretty bad image to the average user who sees the error message from the browser.
which website are you referring to?
I was talking about
https://sexcoin.info, the website of this project. Apparently the developer saw my message and updated the certificate on the server, I no longer receive the warning message.
I would suggest to upgrade the hosting package as well, because the website is really slow and sometimes doesn't load. Just my 2 cents.