Debug Node.js Program Error

I’m stuck on an error that stops my Node.js app from running, and I need a fresh pair of eyes to pinpoint the cause and get it working again. The codebase is fairly small, built with standard ES modules and a handful of npm packages... (Budget: £20 - £250 GBP, Jobs: API, Debugging, Git, Java, JavaScript, Node.js, NoSQL Couch & Mongo, Software Development, Software Engineering, Software Testing)