Error Trying to get property of non-object in drupal_lookup_path() includes/path.inc

Hello ,
I receive this warning:
Notice: Trying to get property of non-object in drupal_lookup_path() (line 77 di /includes/path.inc)

This is the line:

 // If no language is explicitly specified we default to the current URL
  // language. If we used a language different from the one conveyed by the
  // requested URL, we might end up being unable to check if there is a path
  // alias matching the URL path.
  $path_language = $path_language ? $path_language : $language_url->language;

It appears when Amazon Cloudfront get files from drupal + cdn module
Any one with the same problem?

Drupal 7.73