As of version 0.9.6001 this package is hopefully safer? on iOS 8.
Special thanks goes out to /u/Skyyblaze on reddit for reporting this issue. Thanks!
As of version 0.9.6000 this package is arguably safer? on iOS 10.
(In specific, the expected dialog now appears, but if you are using the older Yalu for 10.0-10.1.1 jailbreaks, including the final "b3", clicking Restart will cause the device to lock up so you will need to reboot. This continues to be a known issue with this jailbreak.)
Special thanks goes out to Lance Fetters (ashikase) for both reporting this issue to me and including some example code to make it easier to fix. Thanks!!