Fatal error: Uncaught Error: Call to undefined function cal_days_in_month() in /home/yogurber/public_html/wp-content/plugins/nd-restaurant-reservations/inc/shortcodes/include/nd_rst_reservation_calendar.php:6 Stack trace: #0 /home/yogurber/public_html/wp-content/plugins/nd-restaurant-reservations/inc/shortcodes/nd_rst_reservation_form.php(505): include() #1 /home/yogurber/public_html/wp-includes/shortcodes.php(343): nd_rst_shortcode_reservation_form(Array, '', 'nd_rst_reservat...') #2 [internal function]: do_shortcode_tag(Array) #3 /home/yogurber/public_html/wp-includes/shortcodes.php(218): preg_replace_callback('/\\[(\\[?)(nd_rst...', 'do_shortcode_ta...', '[nd_rst_reserva...') #4 /home/yogurber/public_html/wp-content/plugins/js_composer/include/helpers/helpers.php(240): do_shortcode('[nd_rst_reserva...') #5 /home/yogurber/public_html/wp-content/plugins/js_composer/include/templates/shortcodes/vc_column_text.php(31): wpb_js_remove_wpautop('<p>[nd_rst_rese...', true) #6 /home/yogurber/public_html/wp-content/plugins/js_com in /home/yogurber/public_html/wp-content/plugins/nd-restaurant-reservations/inc/shortcodes/include/nd_rst_reservation_calendar.php on line 6