Upgrade Deprecated everything

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Bottom on page, after upgrading to newest version... **Deprecated**: array_key_exists(): Using array_key_exists() on objects is deprecated. Use isset() or property_exists() instead in **/home/mmrmagazine/public_html/site/wp-content/plugins/responsive-menu/vendor/twig/twig/lib/Twig/Template.php**on line **580** >NAMM Show 2020: Teisco this way for all videos

I fixed it by downgrading to PHP7.3…