Link to add recurring meetings to calendar

Hello,

I am looking to share a recurring meeting link to my Facebook Group, but I want my group to be able to add this meeting easily to their calendar so that they receive automatic notifications. The link to add the event to their calendar seems to not be working. Every time I click on it, it says that I do not have internet connection (I do). I am using an iPhone since this will be the most common device used. Any thoughts on how to resolve this and make it easy for people to add this recurring meeting to their schedules?