Hi @sammypage,
Thank you so much for taking the time to report this!
I’ve shared this with our development team, and they confirmed that this is a non-critical PHP deprecation warning (typically seen when running newer versions of PHP), and the site will function properly.
I have created a ticket for our engineering team to get this code updated. We will implement a fix to properly handle the array offset and clear out this warning in an upcoming release of the plugin.
Thanks again for helping us keep the plugin running smoothly!