Group File Path & Group Subject

Is the Group File Path the path to the json file?

web/sites/default/files/private/groupfile.json

Got the following error:

Error: Class 'Drupal\google_groups\Form\Google_Service_Directory' not found in Drupal\google_groups\Form\GoogleGroupsAuthorizeForm->submitForm() (line 71 of modules/contrib/google_groups/src/Form/GoogleGroupsAuthorizeForm.php).

Is the Group Subject the "client_email" from the json file with the service account credentials?