[Custom Integration] Rental Control - for AirBnB, VRBO, etc

Trying to set this up with VRBO and my Ical link is an http link not an https link. I checked my other properties and they are also http. Is there a way to get this to work?

Thanks

Craig

Edit:
I put the address in as https and disabled the not standard event box and the ssl box. That seems to have worked.

Thanks