HREF problem with Calendar plugin

I’m getting a strange problem with the Calendar plugin when I try and use a HREF link. Here’s the website:
https://goodjobsforall.ca/?page_id=2091&event_id=82

As you can see it’s adding my home page to the Facebook URL. Anybody have any advice?

https://goodjobsforall.ca/%22https://www.facebook.com/futureofjobs/%22

Thanks.