Can't login to ecommerce django admin

I’m trying to setup ecommerce via these instructions

I tried setting up an ecommerce superuser via the following commands:

sudo su ecommerce -s /bin/bash
cd ~/ecommerce
source ../ecommerce_env
./manage.py createsuperuser

I then enter the fields that are prompted to screen and it seems as though these credentials are successfully created.

Whats more when I try to create another superuser account using the same credentials it prompts the following message

When I go to login to the ecommerce django admin ( http://URL.com:18130/admin/login/?next=/admin/
)
and enter the credentials just created the page reloads with the login form fields cleared.

How can I solve this issue?