diff --git a/wp-admin/network/themes.php b/wp-admin/network/themes.php
index f73521baab..4c6febea98 100644
--- a/wp-admin/network/themes.php
+++ b/wp-admin/network/themes.php
@@ -135,11 +135,25 @@ if ( $action ) {
 				<div class="wrap">
 				<?php if ( 1 === $themes_to_delete ) : ?>
 					<h1><?php _e( 'Delete Theme' ); ?></h1>
-					<div class="error"><p><strong><?php _e( 'Caution:' ); ?></strong> <?php _e( 'This theme may be active on other sites in the network.' ); ?></p></div>
+					<?php
+					wp_admin_notice(
+						'<strong>' . __( 'Caution:' ) . '</strong> ' . __( 'This theme may be active on other sites in the network.' ),
+						array(
+							'additional_classes' => array( 'error' ),
+						)
+					);
+					?>
 					<p><?php _e( 'You are about to remove the following theme:' ); ?></p>
 				<?php else : ?>
 					<h1><?php _e( 'Delete Themes' ); ?></h1>
-					<div class="error"><p><strong><?php _e( 'Caution:' ); ?></strong> <?php _e( 'These themes may be active on other sites in the network.' ); ?></p></div>
+					<?php
+					wp_admin_notice(
+						'<strong>' . __( 'Caution:' ) . '</strong> ' . __( 'These themes may be active on other sites in the network.' ),
+						array(
+							'additional_classes' => array( 'error' ),
+						)
+					);
+					?>
 					<p><?php _e( 'You are about to remove the following themes:' ); ?></p>
 				<?php endif; ?>
 					<ul class="ul-disc">
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4e8bfc2334..a8013b7d92 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56600';
+$wp_version = '6.4-alpha-56601';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.