Storyline does not display. Mixed content (HTTPS HTTP)

Hello, I created a storyline for our School of Medicine and generated the web files for our Web team to upload to our website. Our first issue was that our web server system does not accept html files so I renamed the extension of story.html, launcher.html, and analytics-frame.html to htm. The second and current issue is that our web team claims that the content cant be displayed due to mixed content and they ask me to reach out to articulate360 for a solution. This is the link to the page where the content was published: https://www.utrgv.edu/school-of-medicine/education/educational-affairs/introduction-to-the-clerkship/index.htm

Any help is greatly appreciated.

Thanks,