This is My Code.
array(
'id' => $prefix . 'name',
'type' => 'text',
'name' => esc_html__( 'Name', 'text-domain' ),
'tab' => 'personal_information',
'required' => true
),
And I am Used Validation Rules also,
'validation' => array(
'rules' => array(
'name' => array(
'required' => true,
'minlength' => 7
),
),
'messages' => array(
'field_id' => array(
'required' => 'Name is required',
'minlength' => 'Name must be at least 7 characters',
),
),
),
Whats is the problem.the same code worked for me in Meta Box Old Version.
.
