cPanel's Setup Node.js App runs your app through Phusion Passenger, and that changes a few things compared with running node index.js on your laptop. When something doesn't fit, you get a 503 Service Unavailable, "Incomplete response received from application", a blank page, or an app that works on the temporary URL but not on your domain — and the hosting support says it's an application issue.
We work on these every day. The usual causes are an app that listens on a fixed port instead of the one Passenger gives it, a wrong startup file or application root, a Node version different from the one you develop with, dependencies installed for another platform, ES modules or a build step (Next.js, NestJS, TypeScript) that Passenger doesn't run by itself, environment variables missing on the server, the app hitting the account's memory or process limit, or an .htaccess rule sending requests to the wrong place. We read the Passenger and app logs and fix the real cause on your hosting.
You keep your hosting and your code; we make it run, restart cleanly and survive a server reboot, and we tell you exactly what was changed. Free diagnosis, a fixed price, and you pay after the app works on your domain.
Usually Passenger can't start the app: wrong startup file, the app listening on its own fixed port, a crash on start (missing module, missing environment variable), or a memory limit. The Passenger log names the reason.
No. We fix the app on the hosting you have, as long as it gives us cPanel or SSH access. If your plan's limits are the problem, we tell you plainly.
From $29 for a typical Express or Next.js app. You get the exact fixed price after the free diagnosis.
Need it fixed urgently? See our Emergency Fix — response within 30 minutes, 24/7.