Notification/Popup Message Does Not Appear on Validation

I created a custom doctype and applied a restriction for the user that cannot enter a non-negative value. I used it for field data type INT. The doctype validates the value if it is negative it shows a sound and doesn’t save/submit. The user cannot recognise the reason since it just beeps/sounds without any message or notification.

I am expecting, if the value is negative then a popup message or notification should appear to notify the user that negative values are not allowed and so on.

I checked already:

  • Popup-Window is allowed on web-browser.
  • No restriction defined on web-browser or website
  • Tried Chrome, Edge, Firefox, browsers but results are same.

I would like to know why no notification appears. am I missing something or what should I do to show this message?

Below is the environment I am using:

Installed Apps

Frappe Framework: v15.40.6 (version-15)
My First Application: v0.0.1 (develop)

→ Developer Mode ON

Additionally,
I have attached pictures for the reference.

console error:

yes iam facing that issue in my hosted website, eventhough my localhost running properly…

Hi @ashaseeb

I have run the case and looks like working for me.

Please keep in mind it does not work before save as user has to press save button to get notified for non negative element.

Frappe HR: v15.35.3 (version-15)
ERPNext: v15.45.0 (version-15)