Ok, the site is safe, just not being maintained correctly. What’s happened is the site’s SSL security certificate has expired and whomever is responsible for maintaining the site hasn’t bothered to renew the certificate. Chrome, a couple of years ago, implemented required security certificates as standard and so displays the “unsafe” message, regardless of the site’s actual content.
TL:DR: The site is safe to use, just lazy web site owner hasn’t been bothered to update the security certificate. 🙁