Fatal error: Uncaught Error: Class 'MetaSlider_Widget' not found in /wp-includes/class-wp-widget-factory.php:62 Stack trace: #0 /wp-includes/widgets.php(115): WP_Widget_Factory->register('MetaSlider_Widg...') #1 /wp-content/plugins/ml-slider/ml-slider.php(440): register_widget('MetaSlider_Widg...') #2 /wp-includes/class-wp-hook.php(324): MetaSliderPlugin->register_metaslider_widget('') #3 /wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #4 /wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 /wp-includes/widgets.php(1862): do_action('widgets_init') #6 /wp-includes/class-wp-hook.php(324): wp_widgets_init('') #7 /wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #8 /wp-includes/plugin.php(517): WP_Hook->do_action(Array) #9 /wp-settings.php(695): do_action('init') #10 /wp-config.php(98): require_once('/wp-settings.ph...') #11 /wp-load.php(50): require_once('/wp-config.php') #12 /wp-blog-header.php(13): require_once('/wp-load.php') #13 /index.php(17): require('/wp-blog-heade in /wp-includes/class-wp-widget-factory.php on line 62