diff --git a/core/modules/file/src/Controller/FileWidgetAjaxController.php b/core/modules/file/src/Controller/FileWidgetAjaxController.php
index 3adc43a..6876752 100644
--- a/core/modules/file/src/Controller/FileWidgetAjaxController.php
+++ b/core/modules/file/src/Controller/FileWidgetAjaxController.php
@@ -36,7 +36,7 @@ public function upload(Request $request) {
 
     if (empty($request_form_build_id) || $form_build_id !== $request_form_build_id) {
       // Invalid request.
-      drupal_set_message(t('An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (@size) that this server supports.', array('@size' => format_size(file_upload_max_size()))), 'error');
+      drupal_set_message(t('An unrecoverable error occurred. The submitted information does not match the generated form. Try reloading the page and submitting again.'), 'error');
       $response = new AjaxResponse();
       $status_messages = array('#theme' => 'status_messages');
       return $response->addCommand(new ReplaceCommand(NULL, drupal_render($status_messages)));