SSL Error on mooneyeventures.com

My website returns the “Your connection is not private” message when I load.
I have installed the cloudflare SSL.
Kindly assist

Your Cloudflare configuration is working but is returning error 526
https://cf.sjr.org.uk/tools/check?34a080b4251144beba3f9877b4ea7735#connection-server-https

This means the SSL certificate on your origin server is invalid (expired, not trusted, not covering the hostname) so you’ll need to update it if expired or install a Cloudflare origin certificate (requires the use of the proxy) or another certificate from LetsEncrypt or another trusted CA.