Is your site unsafe? If so, then everything appears to be working as intended.
Is your site safe? Then please report the issue to Microsoft. If you click the More Information text on that page, there should be a link to report a false positive.
Please remember that Microsoft is blocking access to your website, not us. We can’t take responsibility for the malfunctioning of any security products you choose to use.
I’ve reported it as a false positive, and they have an option in the same page where the website owner can contact them as well, but I’m not sure if that would be helpful (or even needed, as I hope they’ll process my report and remove it).
On the bright side, visiting http://classof69.kesug.com/index.html gave me no errors, so it seems like your issue may have been fixed @wiclee.
As @YT_Xaos reports, this may not be the case after all. We’re on the same Edge version, so I’m unsure as to why we have a different experience, but as it has been reported as a false positive, it will hopefully be resolved soon.