Just updated Accordions and Accordions pro plugins and found that where accordion first tab is set to be open on page load it is no longer working i.e. all the tab are closed. It was working before the update.
See https://www.jbhrefurbishments.co.uk/services/design-and-build/ for an example.
Sorry for the inconvenience. We've already fixed the issue and updated the plugin. Please install the latest version, 2.2.75, and give it a try.
Let us know the update.