Error Facebook Event

Facebook Single Event – Error
/feed-them-social/feeds/facebook/facebook-feed.php on line 119

#100 – This Page may not be public. Here are some possible solutions to fix the error.

Same error in
http://feedthemsocial.com/facebook-event-feed-demo/

Please Help Me

https://ww.wp.xz.cn/plugins/feed-them-social/