Hello humanesocietytampabay,
I’m sorry that our plugin is not working for you. Unfortunately, it’s a known issue with Windows servers that we currently don’t have a fix for. It is, however, on our radar and we do still have an open ticket for it. There was also a discussion earlier this year that might give you some small insight (https://theeventscalendar.com/support/forums/topic/cant-import-fb-events/page/2/#post-31844).
At the moment, I don’t have a timetable for when this might be addressed, but we do have maintenance releases that go out frequently so it could find it’s way into one of those. I apologize that we don’t have something better for you at the moment.
— Julie