Prestashop Bankwire module goes to blank page

Problem: Prestashop Bankwire module goes to blank page

This may happen to your shop, customer select bankwire payment method and in the final step it goes to  a blank page with this URL:  module/bankwire/validation   that make customers confused.

There is some solutions:

1- Disable and enable the friendly URL option to regenerate .Htaccess file.
2- Clearing the cache.
3- Uninstall the bankwire module and installing it again.

How to change prestashop admin panel url address

Firstly installed prestashop change the admin directory name to something random, like admin1389, then you have to login to your website using http://yoursite.com/admin1389

 if you want to change this url:
1- go to your hosting panel or login through ftp 
2- change the admin folder name to whatever you want
3- use your new url address to login to back-office