Yith Woocommerce Wishlist Button Link 404 Error

Hi sillyme727

Could you please try to add the following code at the end of functions.php file of your theme or child?

if ( defined( 'YITH_WCWL' ) && ! function_exists( 'yith_wcwl_change_polylang_wishlist_url' ) ) {
	function yith_wcwl_change_polylang_wishlist_url( $url, $action = 'view' ) {
		$wishlist_page_id = yith_wcwl_object_id( get_option( 'yith_wcwl_wishlist_page_id' ) );

		$base_url = get_the_permalink( $wishlist_page_id );

		if ( defined( 'POLYLANG_VERSION' ) && pll_current_language() != pll_default_language() ) {
			$translated_page = pll_get_post( $wishlist_page_id );

			if ( $translated_page ) {
				$base_url = get_the_permalink( $translated_page );
			}
		}

		$action_params = explode( '/', $action );
		$params = array();

		if ( isset( $action_params[1] ) ) {
			$action = $action_params[0];
			$params['wishlist-action'] = $action;

			if ( $action == 'view' ) {
				$params['wishlist_id'] = $action_params[1];
			} elseif ( $action == 'user' ) {
				$params['user_id'] = $action_params[1];
			}
		} else {
			$params['wishlist-action'] = $action;
		}

		$base_url = add_query_arg( $params, $base_url );

		return esc_url_raw( $base_url );
	}

	add_filter( 'yith_wcwl_wishlist_page_url', 'yith_wcwl_change_polylang_wishlist_url', 10, 2 );
}

This is a little wishlist – polylang integration I developed, that should force plugin using “query string” version of the url (?action=view&wishlist_id=SOMETHING)

Please, let me know if this works as expected
Have a nice day