diff --git a/wp-admin/plugins.php b/wp-admin/plugins.php
index d8f909a7da..70abe322ed 100644
--- a/wp-admin/plugins.php
+++ b/wp-admin/plugins.php
@@ -641,7 +641,9 @@ if ( isset( $_GET['error'] ) ) :
 	<div id="message" class="error"><p><?php echo $errmsg; ?></p>
 	<?php
 
-	if ( ! isset( $_GET['main'] ) && ! isset( $_GET['charsout'] ) && wp_verify_nonce( $_GET['_error_nonce'], 'plugin-activation-error_' . $plugin ) ) {
+	if ( ! isset( $_GET['main'] ) && ! isset( $_GET['charsout'] )
+		&& isset( $_GET['_error_nonce'] ) && wp_verify_nonce( $_GET['_error_nonce'], 'plugin-activation-error_' . $plugin )
+	) {
 		$iframe_url = add_query_arg(
 			array(
 				'action'   => 'error_scrape',
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 991653df02..b01150bf6f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-49681';
+$wp_version = '5.7-alpha-49683';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.