Hi @loopsterltd thanks for being part of the GitHub Community Forum!
I wanted to jump in and mention that usually the best place to get support for projects hosted on GitHub is directly from the project maintainers themselves. It sounds like you may have spoken to them already (“The developers don’t believe it is because of the update…”); however, you might have better luck continuing to work with the creators of the project directly.
It’s definitely possible another GitHub user may have run into the same problem and might be able to help you, so asking the question here is totally fine! But more often than not, working with the support specifically associated with a project will yield a solution a bit quicker. Most projects will have instructions in their README’s for how to reach support or include contact information, like email addresses.
All that said, best of luck, and I do hope another user is able to help you with this particular issue!