SynthRouter
Error 502

Bad gateway

SynthRouter couldn't reach the app's upstream container.

โœ“
Browser
Reached us
โœ“
SynthRouter
Working
โœ•
App container
Connection refused

What happened?

Your request arrived at SynthRouter just fine, but the upstream container for this app didn't accept the connection. The app is probably crashing on boot, still starting up, or listening on a different port than expected.

What you can do

  • Check the app's deployment logs in your SynthLaunch dashboard.
  • Try restarting the app from the dashboard.
  • Verify that your app listens on the port SynthLaunch assigned.
Host
sarpius.eu
Client IP
216.73.216.209
Request ID
req_02213eb1
Timestamp
2026-09-30 19:48:01 UTC