Website showing Not Secure Error Message

Hello!
Our website www.fitzroytoastmasters.org.au/ had stopped working as our domain had expired, somehow I managed to get the domain back and with the help of another member we made it live again but when the website opens, it shows the error message 'Not Secure'. Please see the attached image.

Can someone please advise me what needs to be done. Thanks!

I just forced the ssl cert to be regenerated. You should be fine.

If you are still seeing issues, your browser may be caching the current non-secure error state... just clear your browser cache in that case. (or put ?12345 or any number after the url to accomplish the same effect)