Could you please check how it works with some default WordPress themes like TwentyTwenty or WooCommerce Storefront to understand is it our theme issue or not?
It errors never happen what I was using default themes.. but the errors stay only 4-5 minutes…The error already has gone automatically. Error Behavior looks, it is wp cache problem..
However, I need suggestions regarding the attached screenshot.
As for the Product Categories – this is Woocommerce functionality. This widget shows all the categories existing on the site. Our theme does not influence.