Uncaught exception 'TypeError' in Dekode\Hogan\Embed::allow_facebook_url_in_kses()

[soderlind]

New Relic reports the following:

TypeError: Uncaught exception 'TypeError' with message 'Argument 1 passed to 
Dekode\Hogan\Embed::allow_facebook_url_in_kses() must be of the type string, array given, 
called in /opt/wordpress/wp-includes/class-wp-hook.php on line 288' 
in /opt/wordpress/wp-content/plugins/hogan-embed/class-embed.php:116

    in Dekode\Hogan\Embed::allow_facebook_url_in_kses called at /opt/wordpress/wp-includes/class-wp-hook.php (288) 
    in WP_Hook::apply_filters called at /opt/wordpress/wp-includes/plugin.php (203) 
    in apply_filters called at /opt/wordpress/wp-includes/kses.php (688) 
    in wp_kses_hook called at /opt/wordpress/wp-includes/kses.php (531) 
    in wp_kses called at /opt/wordpress/wp-includes/kses.php (1576) 
    in wp_kses_post called at /opt/wordpress/wp-content/plugins/ninja-forms/includes/MergeTags/Other.php (54) 
    in NF_MergeTags_Other::init called at /opt/wordpress/wp-includes/class-wp-hook.php (286) 
    in WP_Hook::apply_filters called at /opt/wordpress/wp-includes/class-wp-hook.php (310) 
    in WP_Hook::do_action called at /opt/wordpress/wp-includes/plugin.php (453) 
    in do_action called at /opt/wordpress/wp-settings.php (450) 
    in require_once called at /opt/wordpress/wp-config.php (184) 
    in require_once called at /opt/wordpress/wp-load.php (37) 
    in require_once called at /opt/wordpress/wp-blog-header.php (13) 
    in require called at /opt/wordpress/index.php (17)