🔧 How to solve {'type': '/problems/validation-failed', 'title': "Your request parameters didn't validate.", 'status': 400, 'violations'} error ?

Errors such as:
{'type': '/problems/validation-failed', 'title': "Your request parameters didn't validate.", 'status': 400, 'violations': [{'name': 'phoneNumber', 'reason': 'ongeldig telefoonnummer, mag alleen cijfers, spaties, haakjes ( () ), streepjes ( - ) en plussen ( + ) bevatten, minimaal 7 tekens en maximaal 17 tekens.'}]}

or

{'type': '/problems/validation-failed', 'title': "Your request parameters didn't validate.", 'status': 400, 'violations': [{'name': 'emailAddress', 'reason': 'ongeldig e-mailadres.'}]}

indicate that there is an issue with the economic operator entered in your Bol back office.

Review the affected EANs, check the associated economic operator, as well as the cause of the error (invalid phone number, invalid email address, etc.).
The correction must be made directly in BOL.