doctrine:decrypt throw "The helper helper dialog is not defined"

[martinCabo]

Dears.
I'm trying to decrypt my db that use rijndael256 encryptor, but when I use the line that documentations recommends, it throws the exception "[Symfony\Component\Console\Exception\InvalidArgumentException]
The helper "dialog" is not defined."

I'm using Symfony 3.3.13 and php 7.0.33

I don't know if I'm doing something wrong or if it's a bug. I would appreciate any help you can give me.

Thanks for your time.