Fatal error: Uncaught TypeError: Unsupported operand types: string * int in /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-content/plugins/woo-min-max-quantity-step-control-single/includes/set_max_min_quantity.php:75
Stack trace:
#0 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/class-wp-hook.php(303): wcmmq_qty_validation_by_step_modulous(false, 14890, 0, 1, 'st', 'st')
#1 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/plugin.php(189): WP_Hook->apply_filters(false, Array)
#2 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-content/plugins/woo-min-max-quantity-step-control-single/includes/set_max_min_quantity.php(218): apply_filters('wcmmq_modulous_...', false, 14890, 0, 1, 'st', 'st')
#3 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/class-wp-hook.php(303): wcmmq_min_max_valitaion(true, 14890, 1)
#4 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/plugin.php(189): WP_Hook->apply_filters(true, Array)
#5 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(822): apply_filters('woocommerce_add...', true, 14890, 1)
#6 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(796): WC_Form_Handler::add_to_cart_handler_simple(14890)
#7 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/class-wp-hook.php(303): WC_Form_Handler::add_to_cart_action('')
#8 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)
#9 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-includes/plugin.php(470): WP_Hook->do_action(Array)
#10 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-settings.php(600): do_action('wp_loaded')
#11 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-config.php(124): require_once('/customers/f/9/...')
#12 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-load.php(50): require_once('/customers/f/9/...')
#13 /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-blog-header.php(13): require_once('/customers/f/9/...')
#14 /customers/f/9/c/cerdi.be/httpd.www/winkel/index.php(17): require('/customers/f/9/...')
#15 {main}
  thrown in /customers/f/9/c/cerdi.be/httpd.www/winkel/wp-content/plugins/woo-min-max-quantity-step-control-single/includes/set_max_min_quantity.php on line 75