Fatal error: Uncaught Error: Call to a member function add_to_cart() on null in /home/treebair/domains/treeba.ir/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php:918
Stack trace:
#0 /home/treebair/domains/treeba.ir/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(790): WC_Form_Handler::add_to_cart_handler_variable(1951)
#1 /home/treebair/domains/treeba.ir/public_html/wp-includes/class-wp-hook.php(308): WC_Form_Handler::add_to_cart_action('')
#2 /home/treebair/domains/treeba.ir/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#3 /home/treebair/domains/treeba.ir/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#4 /home/treebair/domains/treeba.ir/public_html/wp-settings.php(645): do_action('wp_loaded')
#5 /home/treebair/domains/treeba.ir/public_html/wp-config.php(114): require_once('/home/treebair/...')
#6 /home/treebair/domains/treeba.ir/public_html/wp-load.php(50): require_once('/home/treebair/...')
#7 /home/treeb in /home/treebair/domains/treeba.ir/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php on line 918