undefined constant user_level | Ultimate Google Analytics

With debug mode set to true in the config file this error caused by ultimate google analytics is triggered.

Notice: Use of undefined constant user_level – assumed ‘user_level’ in /home/content/80/7580780/html/wordpress/wp-content/plugins/ultimate-google-analytics/ultimate_ga.php on line 525

https://www.ads-software.com/extend/plugins/ultimate-google-analytics/