diff --git a/classes/WooCommerce.php b/classes/WooCommerce.php
index efb20b3fad..ed1a156499 100644
--- a/classes/WooCommerce.php
+++ b/classes/WooCommerce.php
@@ -62,7 +62,7 @@ public function __construct() {
 		/**
 		 * After place new order
 		 */
-		add_action( 'woocommerce_new_order', array( $this, 'course_placing_order_from_admin' ), 10, 3 );
+		add_action( 'woocommerce_new_order', array( $this, 'course_placing_order_from_admin' ), 10, 1 );
 		add_action( 'woocommerce_new_order_item', array( $this, 'course_placing_order_from_customer' ), 10, 3 );
 
 		/**
diff --git a/ecommerce/PaymentGateways/Paypal/src/Exceptions/FilesystemException.php b/ecommerce/PaymentGateways/Paypal/src/Exceptions/FilesystemException.php
index 9134da1e84..6b909b20a3 100644
--- a/ecommerce/PaymentGateways/Paypal/src/Exceptions/FilesystemException.php
+++ b/ecommerce/PaymentGateways/Paypal/src/Exceptions/FilesystemException.php
@@ -7,7 +7,7 @@
 
 class FilesystemException extends RuntimeException implements Throwable
 {
-	public function __construct($message = "", $code = 0, Throwable $previous = null)
+	public function __construct($message = "", $code = 0, ?Throwable $previous = null)
 	{
 		parent::__construct(
 			$message,