Unable to register to CoCoin app

Expected behavior

Users are able to register when they click "Sign up" in the settings section for use the application with all functions.

Actual behavior

Users are unable to register when they click "Sign up" in the settings section for use the application with all functions.

How to reproduce

1- Open CoCoin app.

2- Input your password for see accounting records.

3- Click settings.

4- Click Sign in/Sign up

5- You will see a question "Do you have a CoCoin account?"

6- Click "NOT YET" - because we want to create an account.

7- Write your username, e-mail and password in related boxes.

8- Then you will see an error "NETWORK DISCONNECTION".

TESTING ENVIRONMENT

• Operating system: Android 6.0.1
• App version: 1.2.0
• Device: Samsung Galaxy S5 and also I've tried with Bluestacks(OS:Android Nougat)

Recording Of The Bug