diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/class-wp-fatal-error-handler.php
--- a/wp/wp-includes/class-wp-fatal-error-handler.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/class-wp-fatal-error-handler.php	Fri Sep 05 18:40:08 2025 +0200
@@ -16,6 +16,7 @@
  *
  * @since 5.2.0
  */
+#[AllowDynamicProperties]
 class WP_Fatal_Error_Handler {
 
 	/**
@@ -24,6 +25,8 @@
 	 * This method is registered via `register_shutdown_function()`.
 	 *
 	 * @since 5.2.0
+	 *
+	 * @global WP_Locale $wp_locale WordPress date and time locale object.
 	 */
 	public function handle() {
 		if ( defined( 'WP_SANDBOX_SCRAPING' ) && WP_SANDBOX_SCRAPING ) {
@@ -184,7 +187,11 @@
 		if ( true === $handled && wp_is_recovery_mode() ) {
 			$message = __( 'There has been a critical error on this website, putting it in recovery mode. Please check the Themes and Plugins screens for more details. If you just installed or updated a theme or plugin, check the relevant page for that first.' );
 		} elseif ( is_protected_endpoint() && wp_recovery_mode()->is_initialized() ) {
-			$message = __( 'There has been a critical error on this website. Please check your site admin email inbox for instructions.' );
+			if ( is_multisite() ) {
+				$message = __( 'There has been a critical error on this website. Please reach out to your site administrator, and inform them of this error for further assistance.' );
+			} else {
+				$message = __( 'There has been a critical error on this website. Please check your site admin email inbox for instructions.' );
+			}
 		} else {
 			$message = __( 'There has been a critical error on this website.' );
 		}
@@ -193,7 +200,7 @@
 			'<p>%s</p><p><a href="%s">%s</a></p>',
 			$message,
 			/* translators: Documentation about troubleshooting. */
-			__( 'https://wordpress.org/support/article/faq-troubleshooting/' ),
+			__( 'https://wordpress.org/documentation/article/faq-troubleshooting/' ),
 			__( 'Learn more about troubleshooting WordPress.' )
 		);