Hi,
Thanks for using our plugins. Sorry for the issues with this.
Unfortunately, there is no way around that restriction as it comes from Facebook’s side and we cannot change their coding.
If you can remove the age restriction or any other restriction on the Facebook Page that will fix the issue.
If that is not something you can do. You can always request a refund by following our policy outlined here:
https://theeventscalendar.com/knowledgebase/refund-policy/
And we can take care of it. Thanks