A solution to avoiding the warning:
*
When you receive the error message, click Yes.
*
In Internet Explorer, go to Tools, Internet Options, click the Security tab; make sure that in “Select a zone…” window that Internet is selected.
*
Click Custom Level and scroll down about half way to “Display mixed content” in the Miscellaneous section.
*
Change it from Prompt to Enable.
*
Click OK, Yes, and OK. The change should take effect immediately.