Validation messages not working on custom page?

Hi,
I have custom page

class Company extends Page implements HasForms {
    use InteractsWithForms;

    // ....
}

class Company extends Page implements HasForms {
    use InteractsWithForms;

    // ....
}

Each field has custom error messages like

->validationMessages([
    'accepted' => 'Custom error message',
])

->validationMessages([
    'accepted' => 'Custom error message',
])

but submitting form shows the default Laravel messages.