diff --git a/crellyslider.php b/crellyslider.php
index dd876a7..0a41bb1 100644
--- a/crellyslider.php
+++ b/crellyslider.php
@@ -3,7 +3,7 @@
  * Plugin Name: Crelly Slider
  * Plugin URI: https://wordpress.org/plugins/crelly-slider/
  * Description: A free responsive slider that supports layers. Add texts, images, videos and beautify them with transitions and animations.
- * Version: 1.4.0
+ * Version: 1.4.1
  * Author: Fabio Rinaldi
  * Author URI: https://github.com/fabiorino
  * Text Domain: crelly-slider
@@ -18,7 +18,7 @@
 
 define('CS_DEBUG', true);
 
-define('CS_VERSION', '1.4.0');
+define('CS_VERSION', '1.4.1');
 define('CS_MIN_CAPABILITY', 'manage_options');
 define('CS_PATH', plugin_dir_path(__FILE__));
 define('CS_PLUGIN_URL', plugins_url() . '/crelly-slider');
diff --git a/css/crellyslider.css b/css/crellyslider.css
index 52dd980..b6f0ea4 100644
--- a/css/crellyslider.css
+++ b/css/crellyslider.css
@@ -2,7 +2,7 @@
  * Plugin Name: Crelly Slider
  * Plugin URI: https://wordpress.org/plugins/crelly-slider/
  * Description: A free responsive slider that supports layers. Add texts, images, videos and beautify them with transitions and animations.
- * Version: 1.4.0
+ * Version: 1.4.1
  * Author: Fabio Rinaldi
  * Author URI: https://github.com/fabiorino
  * License: MIT
diff --git a/css/crellyslider.min.css b/css/crellyslider.min.css
index 4b73fe5..533d2ad 100644
--- a/css/crellyslider.min.css
+++ b/css/crellyslider.min.css
@@ -2,7 +2,7 @@
  * Plugin Name: Crelly Slider
  * Plugin URI: https://wordpress.org/plugins/crelly-slider/
  * Description: A free responsive slider that supports layers. Add texts, images, videos and beautify them with transitions and animations.
- * Version: 1.4.0
+ * Version: 1.4.1
  * Author: Fabio Rinaldi
  * Author URI: https://github.com/fabiorino
  * License: MIT
diff --git a/js/jquery.crellyslider.js b/js/jquery.crellyslider.js
index 18d8781..2aeb426 100644
--- a/js/jquery.crellyslider.js
+++ b/js/jquery.crellyslider.js
@@ -2,7 +2,7 @@
  * Plugin Name: Crelly Slider
  * Plugin URI: https://wordpress.org/plugins/crelly-slider/
  * Description: A free responsive slider that supports layers. Add texts, images, videos and beautify them with transitions and animations.
- * Version: 1.4.0
+ * Version: 1.4.1
  * Author: Fabio Rinaldi
  * Author URI: https://github.com/fabiorino
  * License: MIT
diff --git a/js/jquery.crellyslider.min.js b/js/jquery.crellyslider.min.js
index 0c34f4c..36bedf4 100644
--- a/js/jquery.crellyslider.min.js
+++ b/js/jquery.crellyslider.min.js
@@ -2,7 +2,7 @@
  * Plugin Name: Crelly Slider
  * Plugin URI: https://wordpress.org/plugins/crelly-slider/
  * Description: A free responsive slider that supports layers. Add texts, images, videos and beautify them with transitions and animations.
- * Version: 1.4.0
+ * Version: 1.4.1
  * Author: Fabio Rinaldi
  * Author URI: https://github.com/fabiorino
  * License: MIT
diff --git a/readme.txt b/readme.txt
index 6f761d0..687a5cb 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Donate link: http://crellyslider.altervista.org/contribute-and-support/
 Tags: animations, layers, texts, images, videos
 Requires at least: 3.9
 Tested up to: 5.4
-Stable tag: 1.4.0
+Stable tag: 1.4.1
 License: MIT
 License URI: http://opensource.org/licenses/MIT
 
@@ -54,6 +54,9 @@ You can find the documentation <a href="http://crellyslider.altervista.org/docum
 
 == Changelog ==
 
+= 1.4.1 =
+* Fixed Gutenberg editor block failing to load.
+
 = 1.4.0 =
 * Added support for Gutenberg: sliders can now be inserted in a page or a post via the WordPress visual editor, no need to use shortcodes anymore (but it will still be supported).
 * Fixed slider option "Start from slide" displaying only "Random slide", as reported <a href="https://wordpress.org/support/topic/start-slide-cannot-be-selected-if-random-start-slide-is-selected">here</a>.
diff --git a/wordpress/ajax.php b/wordpress/ajax.php
index 77cda13..02c7526 100644
--- a/wordpress/ajax.php
+++ b/wordpress/ajax.php
@@ -83,7 +83,7 @@ class SliderForGutenbergBlock {
 	$slidersForGutenberg = array();
 	global $wpdb;
 	$sliders = $wpdb->get_results('SELECT id, alias, name FROM ' . $wpdb->prefix . 'crellyslider_sliders');
-	if($sliders->last_error) {
+	if($wpdb->last_error) {
 		echo json_encode(false);
 		die();
 	}
@@ -96,7 +96,7 @@ class SliderForGutenbergBlock {
 		$slide = $wpdb->get_results($wpdb->prepare(
 			'SELECT background_type_image, background_type_color, background_repeat FROM ' . $wpdb->prefix . 'crellyslider_slides WHERE slider_parent = %d AND position = 0 AND draft = 0', $sliderID
 		));
-		if($slide->last_error) {
+		if($wpdb->last_error) {
 			echo json_encode(false);
 			die();
 		}