[gb2world]

You can use webmaster mode to see if the root category is available in the array that holds the information for the upselling products. If it is not, then you have to modify the php code with the query for the products to include the category.

In 4.4.x - load the page in question with webmaster mode enabled. In the webmaster mode console, select "Show variables". Look for the array with the upselling products. If the category is there, you can use it. If not - the task becomes more complex to modify the query in the php.

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