Grow Social doesn’t like https

I’m seeing an error with Grow-Social that looks like the same problem that was fixed in 1.19.0. The symptoms are

http://swimblackburncenturions.co.uk/ works fine

https://swimblackburncenturions.co.uk/ throws errors in the grow-social plugin

WordPress is configured for http://swimblackburncenturions.co.uk/. I’ve tried changing that to https://swimblackburncenturions.co.uk/ but doesn’t seem to resolve it.

The page I need help with: [log in to see the link]