What does mean the error that is shown at my form?

I have translated error message "Existem alguns erros no formulário. Corrija-os antes de continuar." that is shown on your screenshot to English "There are some errors in the form. Fix them before proceeding.".

This means that you did not fill all required fields on your form and because of that you are unable to submit it. All required fields must be filled. Only then you will be able to submit your form.

From screenshot you provided it seems that you have filled all required fields. Is that correct? 

I have tested your form and I was able to submit it when I filled all required fields. 

If you are still unable to submit your form when you fill all required fields, please let us know.