Request for new access token redirects to blank screen

Hi,

I am trying to fetch access token for authentication. This process for fetching the access token was working fine for the last few months. But, since the last couple of months, I am getting a blank screen when I try to request for a new Access Token.

The steps are illustrated in the screenshots below:

I am requesting an access token for OAuth 2.0 authentication.
I have tried configuring the Callback URL to the following values. Both result in the same issue.
I have also configured the URLs specified below in Azure Active Directory Application.
https://www.getpostman.com/oauth2/callback
https://app.getpostman.com/oauth2/callback

01

I provide my tenant user name.
Next, the login page tries to redirect to my organization page.
But, the redirect is not successful for some reason. I see only blank page and the process for fetching the access token is not successful!!

06

Postman console also does not provide any logs for further inspection.
05