fancy box not working on https mobile site?

Hi, I have an SSL certificate on my site, and I just created a contact form in fancybox and it works beautifully on my website. However, on smartphones (iPhone) it is not working; when clicked, a semi-transparent gray screen fills up the phone’s screen and nothing else. I tested the same code on a non-https site and it works on both my computer and my iPhone.

The code I use:
<p style=”text-align: center;”>Contact Us</p>
<div class=”fancybox-hidden” style=”display: none;”>
<div id=”contact_form_pop”>
[contact-form-7 id=”262″ title=”consultation”]
</div>
</div>

https://wordpress.org/plugins/easy-fancybox/