There was an error proxying the request


I struggle to run my app this morning. It gives me this error: “There was an error proxying the request”. Debugger doesn’t start either.


Can you give us more detail on what kind of application you are running? Also some code or running configuration/parameters are very helpful as well.


My app (flask) was working fine and it is working as expected on my mac. But now when I run it on C9 - python3 run it gets stuck at this stage:

  • Running on (Press CTRL+C to quit)
  • Restarting with stat
    Yesterday I was given the proxy error in my web-preview, today it is just a blank page.


I’m getting this error again. super annoying