Hi,found the problem,system point the imagerotator file wrongly.Please follow steps below:
1.Go to NextGen Gallery Option page
2.Click Slideshow Tab
3.Change the Path to the Imagerotator (URL): to “https://www.yourdomain.com/wp-content/plugins/nextgen-gallery/imagerotator.swf” replace your domain.com with your domain
4.Saves Changes (DO NOT click search now)
5.Done