Privacy Error on Site w/ Previously Working SSL

Unable to access site or wp-admin. The site displays this error when I try to access it: You cannot visit kokos.com right now because the website uses HSTS. Network errors and attacks are usually temporary, so this page will probably work later.

I have tried disabling all plugins through phpmyadmin but that did not help the situation. Please help.

Thank you,

Emma

The page I need help with: [log in to see the link]