Dash crashes when I deploy it with Gunicorn

[manumartinm]

Describe your context

• replace the result of pip list | grep dash below

  dash                 2.10.2
  dash-core-components 2.0.0
  dash-html-components 2.0.0
  dash-table           5.0.0

Describe the bug

I am trying to deploy a dash app to production using Nginx and Ubuntu 22.04, also I am using gunicorn to deploy it.

The problem comes when I try access my domain and dash gives an Internal Server Error due to Flask

TypeError: Flask.__call__() missing 1 required positional argument: 'start_response'

I have not found too much information about this error, and I think it is an internal error

Expected behavior

The app should work fine as in my local machine it work correctly, but when I use it in combination with Gunicorn, it crashes

[alexcjohnson]

I haven’t seen that error before. What is the gunicorn command you’re using to run the app, and what variable is it pointing to in the app file?

[manumartinm]

I am using this command

gunicorn main:server -k uvicorn.workers.UvicornWorker

The server function is a variable that I defined as

server = app.server