When creating categories via API or the admin panel, the category name is not properly validated, allowing invisible characters to be included. Since the category name is used to generate the category URL, these invisible characters are also included in the URL. This results in the category page not functioning correctly and returning a "Page Not Found" error.

1. Create a category with an invisible character in its name using the API or admin panel.
2. Access the API URL for this category.
3. Observe the "Page Not Found" error.

The workaround is to remove the invisible character from the category name, which will also update the URL of the page, resolving the issue.