An error occurred

Error Details
=============
An error of type E_ERROR was caused in line 300 of the file /home/alonbioc/bid4win.shop/wp-content/plugins/woo-product-excel-importer/import.php. Error message: Uncaught Error: Call to a member function set_stock_quantity() on bool in /home/alonbioc/bid4win.shop/wp-content/plugins/woo-product-excel-importer/import.php:300
Stack trace:
#0 /home/alonbioc/bid4win.shop/wp-content/plugins/woo-product-excel-importer/woo_product_importer.php(121): woopei_processData()
#1 /home/alonbioc/bid4win.shop/wp-content/plugins/woo-product-excel-importer/woo_product_importer.php(132): woopei_form()
#2 /home/alonbioc/bid4win.shop/wp-content/plugins/woo-product-excel-importer/woo_product_importer.php(194): woopei_main()
#3 /home/alonbioc/bid4win.shop/wp-includes/class-wp-hook.php(307): woopei_init(”)
#4 /home/alonbioc/bid4win.shop/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(”, Array)
#5 /home/alonbioc/bid4win.shop/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#6 /home/alonbioc/bid4win.shop/wp-admin/admin.php(259): do_action(‘toplevel_page_w…’)
#7 {main}
thrown