Hi,

Open your active theme functions.php file and at the bottom add:

add_action('stec_single_wp_head', function() {
    add_filter('body_class', function($classes) {
        $classes[] = 'single-post';
        return $classes;
    });
});
add_action('stec_single_edit_wp_head', function() {
    add_filter('body_class', function($classes) {
        $classes[] = 'single-post';
        return $classes;
    });
});

This code will add "single-post" class to the event's single page body classes which seems to be required by your theme css.

About the editor, can you please give me wp admin to see what is happening. I believe there is a conflict between the theme and the plugin. It's not uncommon.

Hi,

The filter I've sent you earlier was not in your theme functions.php file so I've put it for you and fixed the shop css issue.