diff --git a/includes/admin/core/class-admin-enqueue.php b/includes/admin/core/class-admin-enqueue.php
index bf934363..e59e5ac4 100644
--- a/includes/admin/core/class-admin-enqueue.php
+++ b/includes/admin/core/class-admin-enqueue.php
@@ -30,8 +30,6 @@ if ( ! class_exists( 'um\admin\core\Admin_Enqueue' ) ) {
 		 * Admin_Enqueue constructor.
 		 */
 		function __construct() {
-			$this->slug = 'ultimatemember';
-
 			$this->js_url = um_url . 'includes/admin/assets/js/';
 			$this->css_url = um_url . 'includes/admin/assets/css/';
 
diff --git a/includes/admin/core/class-admin-forms.php b/includes/admin/core/class-admin-forms.php
index d59f7cec..e8cb65e4 100644
--- a/includes/admin/core/class-admin-forms.php
+++ b/includes/admin/core/class-admin-forms.php
@@ -55,11 +55,11 @@ if ( ! class_exists( 'um\admin\core\Admin_Forms' ) ) {
 			ob_start();
 
 			foreach ( $this->form_data['fields'] as $field_data ) {
-				if ( isset( $field_data['type'] ) && 'hidden' == $field_data['type'] )
-					echo $this->render_form_row( $field_data );
+				if ( isset( $field_data['type'] ) && 'hidden' == $field_data['type'] ) {
+				    echo $this->render_form_row( $field_data );
+				}
 			}
 
-
 			if ( empty( $this->form_data['without_wrapper'] ) ) { ?>
 
 				<table <?php echo $class_attr ?>>
@@ -248,14 +248,7 @@ if ( ! class_exists( 'um\admin\core\Admin_Forms' ) ) {
 				}
 
 			} else {
-				if ( method_exists( $this, 'render_' . $data['type'] ) ) {
-
-					$html .= call_user_func( array( &$this, 'render_' . $data['type'] ), $data );
-
-				} else {
-					$html .= $this->render_field_by_hook( $data );
-
-				}
+				$html .= $this->render_hidden( $data );
 			}
 
 			return $html;
@@ -326,7 +319,7 @@ if ( ! class_exists( 'um\admin\core\Admin_Forms' ) ) {
 		function render_hidden( $field_data ) {
 
 			if ( empty( $field_data['id'] ) )
-				return false;
+				return '';
 
 			$id = ( ! empty( $this->form_data['prefix_id'] ) ? $this->form_data['prefix_id'] : '' ) . '_' . $field_data['id'];
 			$id_attr = ' id="' . $id . '" ';
diff --git a/includes/admin/core/class-admin-menu.php b/includes/admin/core/class-admin-menu.php
index 88abb645..03058af9 100644
--- a/includes/admin/core/class-admin-menu.php
+++ b/includes/admin/core/class-admin-menu.php
@@ -20,14 +20,13 @@ if ( ! class_exists( 'um\admin\core\Admin_Menu' ) ) {
 		 * @var string
 		 */
 		var $pagehook;
+		var $slug = 'ultimatemember';
 
 
 		/**
 		 * Admin_Menu constructor.
 		 */
 		function __construct() {
-			$this->slug = 'ultimatemember';
-
 			add_action( 'admin_menu', array( &$this, 'primary_admin_menu' ), 0 );
 			add_action( 'admin_menu', array( &$this, 'secondary_menu_items' ), 1000 );
 			add_action( 'admin_menu', array( &$this, 'extension_menu' ), 9999 );
diff --git a/includes/admin/core/class-admin-metabox.php b/includes/admin/core/class-admin-metabox.php
index f9440548..cb9da294 100644
--- a/includes/admin/core/class-admin-metabox.php
+++ b/includes/admin/core/class-admin-metabox.php
@@ -24,9 +24,6 @@ if ( ! class_exists( 'um\admin\core\Admin_Metabox' ) ) {
 		 * Admin_Metabox constructor.
 		 */
 		function __construct() {
-
-			$this->slug = 'ultimatemember';
-
 			$this->in_edit = false;
 			$this->edit_mode_value = null;