response undefined in .on('upload-error', (file, error, response) => ...)

[angelaman]

Initial checklist

• I understand this is a bug report and questions should be posted in the Community Forum
• I searched issues and couldn’t find anything (or linked relevant results below)

Link to runnable example

https://stackblitz.com/edit/vitejs-vite-mrjtcx?file=main.js

Steps to reproduce

1. upload any file
2. look in the console for message: "Uppy-Error ********************

Expected behavior

In the setup, I added callback on upload error:

.on('upload-error', (file, error, response) => {
    console.log('Uppy-Error ********************', response);
  })

"Uppy-Error ******************** " should be followed with actual response from the http request

Actual behavior

"Uppy-Error ******************** undefined"

undefined is found instead of actual response

[AxelWerner]

Same issue here, I hope this can be fixed soon.

[Murderlon]

How did you actually reproduce this with a real setup? You leave your xhr endpoint empty, if no server exists it's not possible to ever receive a response. Uppy should probably check if endpoint is an empty string and throw and error early.