That advice solved my problem, and Connections is working again.
I’d recommend that the installer should to ensure that it the destination drive is accessible, and that it has write permission in the intended directory, and report back if not. And if the Connections directory already exists, a more graceful failure would provide the user with information along the lines you provided in your solutions.
I like Connections, and it is a good improvement to my site. You can see it in action here: http://www.biorational.solutions/?page_id=149 Thanks for your quick and helpful response.