fatal erro

tested 10 plugins today all have limited functionality then i saw yours and my eyes got big, then i tried to buy your demo event

and go the error:

Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /home4/a60p1p9l/beta.starpaintonline.com/wp-content/plugins/mage-eventpress/inc/mep_functions.php:3630 Stack trace: #0 /home4/a60p1p9l/beta.starpaintonline.com/wp-content/plugins/mage-eventpress/inc/mep_extra_price.php(55): mep_cart_ticket_type('ticket_type', '', '10440') #1 /home4/a60p1p9l/beta.starpaintonline.com/wp-includes/class-wp-hook.php(310): mep_add_custom_fields_text_to_cart_item(Array, '10440', 0) #2 /home4/a60p1p9l/beta.starpaintonline.com/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #3 /home4/a60p1p9l/beta.starpaintonline.com/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1143): apply_filters('woocommerce_add...', Array, 10441, 0, 1) #4 /home4/a60p1p9l/beta.starpaintonline.com/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(824): WC_Cart->add_to_cart(10441, 1) #5 /home4/a60p1p9l/beta.starpaintonline.com/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(796): WC_Form_Handler::add_to_cart_handler_simple(10441) #6 /home4/a60p1p9l/beta.starpaintonline.com/wp-includes/class-wp-hook.php(308): WC_Form_Handler::add_to_cart_action('') #7 /home4/a60p1p9l/beta.starpaintonline.com/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #8 /home4/a60p1p9l/beta.starpaintonline.com/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #9 /home4/a60p1p9l/beta.starpaintonline.com/wp-settings.php(645): do_action('wp_loaded') #10 /home4/a60p1p9l/beta.starpaintonline.com/wp-config.php(112): require_once('/home4/a60p1p9l...') #11 /home4/a60p1p9l/beta.starpaintonline.com/wp-load.php(50): require_once('/home4/a60p1p9l...') #12 /home4/a60p1p9l/beta.starpaintonline.com/wp-blog-header.php(13): require_once('/home4/a60p1p9l...') #13 /home4/a60p1p9l/beta.starpaintonline.com/index.php(17): require('/home4/a60p1p9l...') #14 {main} thrown in /home4/a60p1p9l/beta.starpaintonline.com/wp-content/plugins/mage-eventpress/inc/mep_functions.php on line 3630
There has been a critical error on this website.