PHP Notice - Property of Non-Object

Please let me know if you are able to provide update to address the error I'm seeing:

PHP Notice: Trying to get property of non-object in /nas/content/staging/install_name/wp-content/plugins/google-analytics-async/google-analytics-async-files/class-widget-ga-most-popular-content.php on line 66, referer: http://my.staging-site@wpengine. com/wp-admin/admin.php?page=gf_edit_forms&view=settings&id=4

Thank you,
Ian