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Uncaught Error: Attempt to modify property "classes" on null
in /is/htdocs/wp10611825_54K4XX94PM/www/wordpress/wp-content/themes/comoedie-dresden/functions.php on line 453

Call stack:

1. jf_wp_nav_menu_objects_sub_menu(array, stdClass)
   wp-includes/class-wp-hook.php:324
2. WP_Hook::apply_filters(array, array)
   wp-includes/plugin.php:205
3. apply_filters('wp_nav_menu_objects', array, stdClass)
   wp-includes/nav-menu-template.php:234
4. wp_nav_menu(stdClass)
   wp-content/themes/comoedie-dresden/taxonomy-production_categories.php:75
5. include('/is/htdocs/wp1061182...ction_categories.php')
   wp-includes/template-loader.php:106
6. require_once('/is/htdocs/wp1061182.../template-loader.php')
   wp-blog-header.php:19
7. require('/is/htdocs/wp1061182...s/wp-blog-header.php')
   index.php:17