Fatal error: Uncaught Error: Class 'WP_Translation_Controller' not found in /wp-includes/l10n.php:800 Stack trace: #0 /wp-includes/l10n.php(1013): load_textdomain('post-duplicator', '//wp-content/la...', 'pl_PL') #1 /wp-content/plugins/post-duplicator/m4c-postduplicator.php(59): load_plugin_textdomain('post-duplicator', false, 'post-duplicator...') #2 /wp-includes/class-wp-hook.php(324): mtphr_post_duplicator_localization('') #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-settings.php(506): do_action('plugins_loaded') #6 /wp-config.php(82): require_once('/wp-settings.ph...') #7 /wp-load.php(50): require_once('/wp-config.php') #8 /wp-blog-header.php(13): require_once('/wp-load.php') #9 /index.php(17): require('/wp-blog-header...') #10 {main} thrown in /wp-includes/l10n.php on line 800

Fatal error: Uncaught Error: Class 'WP_Translation_Controller' not found in /wp-includes/l10n.php:800 Stack trace: #0 /wp-includes/l10n.php(957): load_textdomain('default', '//wp-content/la...', 'pl_PL') #1 /wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /wp-includes/l10n.php on line 800