Background of the issue:
I am working on a site under development where the base language is NL and the second language is EN. I am trying to view a WooCommerce product category page in NL.
Symptoms:
When WPML is enabled, the NL product category page ends in a 404 error, while the EN page is visible.
Questions:
Why does the NL product category page end in a 404 error when WPML is enabled?
How can I fix the 404 error on the NL product category page?