Fix & Document Web App

My web application is failing to run reliably, and I want to get to the bottom of it with an experienced developer working in real time alongside me. We will pair-debug over a shared session, isolate the breaking points, and turn the codebase into a clean, consistently runnable build... (Budget: £10 - £15 GBP, Jobs: Debugging, Git, JavaScript, PHP, Software Architecture, Software Testing, Video Editing, Web Development)