Uncaught Error: Call to a member function has() on null

There is a similar topic here – https://wordpress.org/support/topic/fatal-error-uncaught-error-call-to-a-member-function-get-on-null/ … could you try this first?

The best way to determine this is to:

    Temporarily switch your theme to Storefront
    Disable all plugins except for WooCommerce
    Repeat the action that is causing the problem

You are right. This is from WordPress Core, code – https://github.com/WordPress/WordPress/blob/master/wp-includes/l10n.php:

* @param string $domain Text domain. Unique identifier for retrieving translated strings.
 * @return bool True when the textdomain is successfully loaded, false otherwise.
 */
function _load_textdomain_just_in_time( $domain ) {
	/** @var WP_Textdomain_Registry $wp_textdomain_registry */
	global $l10n_unloaded, $wp_textdomain_registry;

	$l10n_unloaded = (array) $l10n_unloaded;

	// Short-circuit if domain is 'default' which is reserved for core.
	if ( 'default' === $domain || isset( $l10n_unloaded[ $domain ] ) ) {
		return false;
	}

	if ( ! $wp_textdomain_registry->has( $domain ) ) {
		return false;
	}

	$locale = determine_locale();
	$path   = $wp_textdomain_registry->get( $domain, $locale );
	if ( ! $path ) {
		return false;
	}
	// Themes with their language directory outside of WP_LANG_DIR have a different file name.
	$template_directory   = trailingslashit( get_template_directory() );
	$stylesheet_directory = trailingslashit( get_stylesheet_directory() );
	if ( str_starts_with( $path, $template_directory ) || str_starts_with( $path, $stylesheet_directory ) ) {
		$mofile = "{$path}{$locale}.mo";
	} else {
		$mofile = "{$path}{$domain}-{$locale}.mo";
	}

	return load_textdomain( $domain, $mofile, $locale );
}

Google shows relevance to WPML plugin, however you said, you disabled all plugins, right?
https://websitecare.io/solution-uncaught-error-call-to-undefined-method-wp_textdomain_registryreset/
https://wpml.org/forums/topic/fatal-error-uncaught-error-call-to-undefined-method-wp_textdomain_registry/page/2/