NextGen Plugin error

Hello everyone,

Kindly i need your help about my Nextgen plugin problem.

Problem: when i want to create new post, and click “greeen button” to insert image from nextgen gallery, the problem is when I click to dropdown “What would you like to display?” the option under that list not funtion.

How can I solve this problem without delete the plugin, because worried the all gallery will detele too…

https://wordpress.org/plugins/nextgen-gallery/