side bar does not show

Hi dear sir/madam,

For the page created by product category template, the sidebar can not be shown
(as left: https://diarts-tech.com/product-category/serial-rs485/).

The original product category page with sidebar is as below,
https://diarts-tech.com/product-category/usb-c/

please kindly help for the sidebar issue, thanks so much.

Add New Note to this Reply