Woocommerce Category image display is note working

First of all thank you for this very very good plugins it’s really help me. my question is i install my woocommerce plugins and it’s working fine. and then a install “Woocommerce Category plugins” to display my the product with category with the image but is not working this is the result “Warning: Invalid argument supplied for foreach() in C:xampphtdocsbarflywp-contentpluginswoocommerce-category-widgetwoocommerce-category-widget.php on line 445” but when i put to the main side bar is working fine. i think it’s a conflict. im using tweentythirteen themes in the wordpress. best regards hash