[ Please create Your own Post/Page (Start Title with your Name or Something) with the documentation help.
At the end of checking please delete Your own Page and remove Your JS script from Settings Page.
You can create Form using Contact Form 7 plugin Contact Menu. ]
Please check Documentation:
https://docs.mgscoder.com/daterange-picker-documentation/Live Demo wp-admin Credential:
https://mgsdemo.mgscoder.com/wp-plugins/daterange-picker-plugin/wp-admin/user: demo
pass: demo