Fatal error: Cannot redeclare wp_add_editor_classic_theme_styles() (previously declared in /var/www/html/wp-includes/deprecated.php:6438) in /var/www/html/wp-includes/script-loader.php on line 3326

Fatal error: Uncaught Error: Call to a member function set() on null in /var/www/html/wp-includes/l10n.php:857 Stack trace: #0 /var/www/html/wp-includes/l10n.php(960): load_textdomain('default', '/var/www/html/w...', 'fr_FR') #1 /var/www/html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /var/www/html/wp-includes/l10n.php on line 857