Small Prestashop 1.7.8.2 issue, account create not working -- 2

I'm having issues with Prestashop:

When you go to: https://stage.rentalworks.be/aanmelden?create_account=1
and try creating an account. The website just refreshes, like a loop.
No account is created. Customers are stuck.

I had the same issue in the past. the issue was related to hooks & a controller :
controllers/front/AuthController.php

For you to fix this controller issue. It should be small issue but I don't have php experience and need it fixed today.

https://stage.rentalworks.be/aanmelden?create_account=1

Thanks