WordPress taxonomy for CPT goes to 404 page

Question

Within WordPress I have set up my Permalinks with a custom structure of /resources/insights/%postname%/ with the category base as resources/insights/category which works exactly as intended.

I have a CPT called clients with the following code:

register_post_type('clients',
    array('labels' => array(
        'name' => __('Clients'),
        'singular_name' => __('Client')),
        'supports' => array('title', 'thumbnail'),
        'public' => true,
        'has_archive' => true,
        'show_in_rest' => true,
        'publicly_queryable' => true,
        'rewrite' => array('slug' => 'clients', 'with_front' => false),
        'menu_icon' => 'dashicons-analytics'
    )
);

this also works as intended. However, I have set up a taxonomy for the clients but when I go to the taxonomy page it presents with a 404. This is my code for the taxonomy:

register_taxonomy('client-categories', array('clients'), array(
    'hierarchical' => true,
    'show_ui' => true,
    'show_in_rest' => true,
    'show_admin_column' => true,
    'query_var' => false,
    'rewrite' => array('slug' => 'clients/category', 'with_front' => false),
));

Any help would be greatly appreciated.