HTTPS ERROR, no http content on site but still the error

The mixed content is

ixed Content: The page at ‘https://www.vpnoneclick.com/’ was loaded over HTTPS, but requested an insecure image ‘http://www.vpnoneclick.com/’. This content should also be served over HTTPS.

I’m also not finding it. But it appears that when I request an https page I get an http page back.

I *think* the error is coming from the Yoast plugin, where you set the default image for Facebook as

<script type='application/ld+json'>{"@context":"http:\/\/schema.org","@type":"WebSite","url":"https:\/\/www.vpnoneclick.com\/","name":"VPN One Click","potentialAction":{"@type":"SearchAction","target":"https:\/\/www.vpnoneclick.com\/?s={search_term_string}","query-input":"required name=search_term_string"}}</script>
<script type='application/ld+json'>{"@context":"http:\/\/schema.org","@type":"Organization","url":"https:\/\/www.vpnoneclick.com\/","sameAs":["http:\/\/www.facebook.com\/VpnOneClick\/","http:\/\/www.youtube.com\/user\/VpnOneClick"],"name":"VPN One Click","logo":"<strong>http:\/\/www.vpnoneclick.com\/wp-content\/uploads\/2016\/04\/VPNONECLICK-LOGO_burned.png</strong>"}</script>
<!-- / Yoast SEO plugin. -->

and there’s a download link

class="column mcb-column one column_button"><div class="button_align align_center"><a class="button button_size_2 button_js" href="http://www.vpnoneclick.com/download/" ><span class="button_label">DOWNLOAD VPN ONE CLICK FOR FREE</span></a></div>

go to the plugin’s settings, on the social tab, and check the default image setting for facebook.

If that does not resolve it, install the plugin “better search and replace”

https://wordpress.org/plugins/better-search-replace/

Search for http://www.vpnoneclick.com and replace with https://www.vpnoneclick.com

all of them