It not work for me. Cannot register my number. The buttons sms and call me not working. What I am doing wrong?

Before I used Whatsapp on Andoid and Iphone. I even delete my whatsapp account, but looks nothing helps.
I got the idea that only users that register before and already used whatsup before can use whatsup again.

If Ik look in the terminal I see this output:

SMS
[w] unknown:285 - file:///usr/share/whatsup/qml/pages/RegisterPage.qml:285: TypeError: Cannot call method 'substring' of undefined

CallME
[w] unknown:308 - file:///usr/share/whatsup/qml/pages/RegisterPage.qml:308: TypeError: Cannot call method 'substring' of undefined