No events showing

I need some help sir.
I’ve been using your wonderful GCAL widget for some time now and our Boy Scout Troop can’t do without it.
I can’t seem to get the actual events to pull through from our google calendar and show on our site.
How might I get support with this issue? I’d be willing to compensate for the help.

Thank you!!!!!

https://www.ads-software.com/plugins/google-calendar-events/