Fatal error: Uncaught ValueError: Unknown format specifier "a" in /customers/e/9/9/arenaristorante.nl/httpd.www/wp-content/plugins/quandoo-restaurant-reservations/classes/class-quandoo-reservation-post-type.php:46 Stack trace: #0 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-content/plugins/quandoo-restaurant-reservations/classes/class-quandoo-reservation-post-type.php(46): sprintf('Search %a', 'Widgets') #1 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-includes/class-wp-hook.php(287): Quandoo_Reservation_Post_Type->register_post_type('') #2 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #3 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #4 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-settings.php(540): do_action('init') #5 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-config.php(89): require_once('/customers/e/9/...') #6 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-load.php(37): require_once('/customers/e/9/...') #7 /customers/e/9/9/arenaristorante.nl/httpd.www/wp-blog-header.php(13): require_once('/customers/e/9/...') #8 /customers/e/9/9/arenaristorante.nl/httpd.www/index.php(17): require('/customers/e/9/...') #9 {main} thrown in /customers/e/9/9/arenaristorante.nl/httpd.www/wp-content/plugins/quandoo-restaurant-reservations/classes/class-quandoo-reservation-post-type.php on line 46