Background of the issue:
I am trying to resolve a critical issue with our multilingual WooCommerce site where Italian product category pages return 404 errors. The broken URL is 隐藏链接, while the English equivalent works correctly: 隐藏链接. The issue can be seen at 隐藏链接.
Symptoms:
Italian product category pages return 404 errors, while all other pages, including Italian product pages, work correctly.
Questions:
Why are Italian product category pages returning 404 errors?
How can I fix the 404 error on Italian product category pages?