You choose offer, then you click "włącz się", next you follow to the contact form, You should click "zgłoś chęć współpracy" and see message: The form contains incorrect danephone_no
suppose, you have to enter a phone number / it is mandatory field, but there is no suggestion about it
You choose offer, then you click "włącz się", next you follow to the contact form, You should click "zgłoś chęć współpracy" and see message: The form contains incorrect danephone_no suppose, you have to enter a phone number / it is mandatory field, but there is no suggestion about it