Please ignore #3, your site doesn't have active Rocket Loader and CF. And it doesn't look like permalink related. Let's first focus on CORS issue, these are the errors I'm getting:
Failed to set referrer policy: The value '' is not one of 'no-referrer', 'no-referrer-when-downgrade', 'origin', 'origin-when-cross-origin', 'same-origin', 'strict-origin', 'strict-origin-when-cross-origin', or 'unsafe-url'. The referrer policy has been left unchanged.
Access to Image at 'http://www.mypropertyoptions.com.au/wp-content/uploads/2016/07/Housebg.jpg' from origin 'https://www.mypropertyoptions.com.au' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://www.mypropertyoptions.com.au' is therefore not allowed access.
Please install Better Search Replace plugin and replace this
https://www.mypropertyoptions.com.au/wp-content/ from all tables. Then flush your permalinks by re-saving it in
Admin > Settings > Permalinks. There are many MIXED errors due to CORS and let's focus on that issues first