Update 6.0

What happens if you re-save your permalinks? settings->permalinks and click “save”.

made. the problem is not solved.

1. Please double check a product to make sure the product categories are correct.

2. This may be a plugin or theme conflict. Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.

made. the problem is not solved.

Let’s take this to the Woo folks. I recommend asking at https://www.ads-software.com/support/plugin/woocommerce/#new-post so the plugin’s developers and support community can help you with this.

Thank you