Feed cookie caching issue

Hi, After updating, im experiencing an issue.
I did deactivate the plugin, but still no luck.

Please have a look here: https://store.moonstone.co.za/
there is still the words “feed” in the top left,
And when i try to login as admin, I get a blocked cookie issue.
I tried different browsers and allowed this site in cookie settings.
https://www.evernote.com/l/ASEg77rrDjtLE51u8fHTER9BTzxPt6kN3gw

I added this script, but since removed it:

function tifd_feedzy_cache_duration( $feedCacheDuration, $feedURL ) {
    if( 'https://store.moonstone.co.za/advisor-store/feed?product_cat=dvd' == $feedURL )
        return 60*1; //5 minutes
    return $feedCacheDuration;
}
add_filter( 'wp_feed_cache_transient_lifetime', 'tifd_feedzy_cache_duration', 10, 2 );

Thank you,