必须配置路径“ewz_recaptcha”中的Symfony 4 Recaptcha包“public_key”

I'm using symfony 4 and recaptcha bundle from https://packagist.org/packages/excelwebzone/recaptcha-bundle#v1.5.11, but i don't know why it doesn't work. Below is the error i got. I configured env google recaptcha variables.

The file "C:\xampp\htdocs\projects\symfony-template\config/packages/ewz_recaptcha.yaml" does not contain valid YAML in C:\xampp\htdocs\projects\symfony-template\config/packages/ewz_recaptcha.yaml (which is loaded in resource "C:\xampp\htdocs\projects\symfony-template\config/packages/ewz_recaptcha.yaml").

yaml file:

ewz_recaptcha:
  public_key:  HIDDEN
  private_key:  HIDDEN
  # Not needed as "%kernel.default_locale%" is the default value for the locale key
  locale_key:  %kernel.default_locale%

HIDDEN equals keys from google, but i covered it here for security reasons.

Notes:

First: You have to create config/packages/ewz_recaptcha.yaml

Second: YAML file have to valid format:

 ewz_recaptcha:
    public_key:  "here is your public key (this is just example)" 
    private_key: "here is your private key (this is just example too)
    # Not needed as "%kernel.default_locale%" is the default value for the locale key
    locale_key:  %kernel.default_locale%