I noticed this was added on line 2163 in your Style.CSS file of your Child theme –
div#footer {
display:none;
background-color:f5f5f5;
}
That definitely has something to do with it. Also, after checking the source code, I don’t see any content added to the Footer Area. If we’re talking about the very bottom of the theme, it should at least show the site/theme name, copyright, etc. If it doesn’t show, then that means there is probably some custom code that you added or another plugin that is interfering with the default code. Did you add anything to alter this section?
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