Why am I receiving an insecure content error message?
From Acenet Knowledgebase
Are you receiving an error about your page(s) having insecure content when visiting them securely (https)? The error means that you are visiting a page securely in your web browser but some content is not being referenced securely. For example, let's say you have the following code in one of your site's files:
Better yet, you could change the code to use relative links instead of absolute:
Keywords: SSL