❓ [php, uploadAsync] Error response from server is not showing

[enkr1]

Prerequisites

• [yes] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [yes] The issue still exists against the latest master branch of bootstrap-fileinput.
• [yes] This is not an usage question. I confirm having read the plugin documentation and demos.
• [no] This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• [yes] I have attempted to find the simplest possible steps to reproduce the issue.
• [no] I have included a failing test as a pull request (Optional).

Expected behavior and actual behavior

This is the response which has the error followed the documentation here:

I was expecting that the error will be shown instead of displaying a success message, DONE.

Environment

Browsers

• [yes] Google Chrome
• [yes] Mozilla Firefox
• [yes] Internet Explorer
• [yes] Safari

Operating System

• [no] Windows
• [yes] Mac OS X
• [no] Linux
• [no] Mobile

Libraries

• jQuery version: latest
• bootstrap-fileinput version: latest

[enkr1]

Thanks in advance, and it is quite urgent. :)