Custom Field Date Issue

I am trying to setup the custom field area to provide a scheduled date on a ticket using the provided documentation (https://getawesomesupport.com/documentation/awesome-support/custom-fields/)

I have been able to successfully create other field types (text, textarea, email, number, etc.), but do not see anything when I choose the date field option.

This is the code that I was testing:

wpas_add_custom_field( ‘schdate’, array(
‘title’ => ‘Scheduled’,
‘field_type’ => ‘date’,
‘show_column’ => true,
‘sortable_column’ => true
) );

Any insight into this would be helpful. Thank you!