Username field is not shown in Woocommerce’s registration contact form

I just fund the tricky solution, it was very simple and I did think about it.

I just went to WooCommerce -> Settings -> Accounts and I untick the checkbox for “Automatically generate username from customer email”.

I got the solution from this topic but here the problem was the contrary:

https://stackoverflow.com/questions/32781569/remove-username-field-registration-form-woocommerce