first changed

app/code/vendor/guzzlehttp/promises/src/CancellationException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace GuzzleHttp\Promise;
+
+/**
+ * Exception that is set as the reason for a promise that has been cancelled.
+ */
+class CancellationException extends RejectionException
+{
+}