Cannot complete the USPS upgrade (The shipping module detail window is not rendering)

[phizah]

•What version of Zen Cart?

v1.3.9h

•Is it a new install or an upgrade?

N/A

•What the addons/contributions you have installed?

Updated the USPS Shipping Module....

•What customizations have you made?

N/A

•What type of server are you using?

Web hosting server (which uses Cpanel)

•Are you installing locally?

No

•What operating system?

Linux

•What version of PHP is installed on the server?

PHP 5.4.28

•What version of MYSQL is installed on the server?

Version 5.5.42-cll

•What you were doing when your problem occurred?

I was merely trying to update the usps shipping module because when attempting to use the USPS to estimate shipping cost, it was not returning any result.
I was following the instructions as prescribed in this link: http://www.zen-cart.com/downloads.php?do=file&id=1292

When, I removed the USPS shipping module for upgrading, that's when I noticed that the shipping module window does not work. The payment module screenshot is included for reference:

Payment Module Screenshot
Attachment 15370


Shipping Module Screenshot
Attachment 15371

•What are the steps to reproduce the problem?

Remove the USPS shipping module addon, and then you will not be able to view the shipping module detail window that is displayed to the right.

•Have you attempted to fix the problem?

Yes

•What steps have you taken?

I tried to write to a log file to determine at which point the code fails, and I have found the place in zc_admin/modules.php around line 250...when it is going to execute: ksort($installed_modules);



•Any other details that might be important, i.e. the port number

N/A