Type: Datepicker Error

[MonaChavan]

Hi Everyone, I'm trying get a custom field in slack app called START DATE, for this i'm using TYPE:Datepicker from slack modal block kit builder templates, but using this 'Datepicker', i'm not able to complete my submission in slack app. On the other hand, if i use TYPE: plain_text_input it works. But i want Datepicker type, so that i can select a dates from the calender. Please anyone help me to solve this error. Thank you.