All apps are crashing differently on iOS9 beta. Because of this, Apple disabled App Store reviews from devices running iOS 9 betas, as mentioned in the attached article. (http://arstechnica.com/apple/2015/07/apple-disables-app-store-reviews-from-devices-running-ios-9-betas/ )

Laserfiche iOS Mobile app is having similar issues and we are releasing an iOS9 hotfix soon. We'll have another announcement when the hotfix is released. Hope this helps you plan your upgrade accordingly.

Thank you.

Regards，

Julia