template translation does not work

After updating to WordPress 6.7, the template translation does not work
If in WordPress 6.6.2, the template translation file was loaded well

I use this code in my template to call translation
please help me
And edit the code to work in WordPress 6.7

load_theme_textdomain( 'dp', get_template_directory() . '/languages' );
$locale = get_locale();
$locale_file = get_template_directory() . "/languages/$locale.php";
if ( is_readable( $locale_file ) )
require_once( $locale_file );