Hi David, thanks for reading and giving feedback! It's been a while since the demo was created, and it definitively needs an upgrade. The Lambda function was using Java 11 (as it was the latest runtime supported at the time), while the rest of the project is using 17. I'll have a look; I'm sure some improvements are due. In the meantime, can you please tell me a bit more about when/how you're experiencing the error and what the message is?