Error when installing WordFence

When I try activating WF, it gives me this error:

Warning: require_once(NGGALLERY_ABSPATH/admin/functions.php): failed to open stream: No such file or directory in /home/jbrealty/public_html/wp-content/plugins/nextgen-gallery-media-library-addon/nggmla-class.php on line 805

Fatal error: require_once(): Failed opening required ‘NGGALLERY_ABSPATH/admin/functions.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/jbrealty/public_html/wp-content/plugins/nextgen-gallery-media-library-addon/nggmla-class.php on line 805

http;//joanbullard.com

https://ww.wp.xz.cn/plugins/wordfence/