[System] Error update notification state for iOS devices

[SK]

Hi there! 

Device: nRF52 DK 

App: nRF connect

Compiler/IDE: Segger Embedded studio

SDK version: 14.2

Soft device: s132

Problem description: I am trying to run blood pressure service example (ble peripheral) on an iOS device. When i click the play button i see the following error on the log:

[System] error update notification state for charact. 2A35 Authentication is insufficient.

Could you please let me know what can be the issue here? 

I tried to use the same on a Samsung mobile and it works perfectly fine. 

Thank you!  

[SK]

Guys, any lead here would be really helpful. 

Thanks! 

[SK]

Just to update here, it was happening because of the firmware. Once i did the firmware update, it worked fine. 

Thanks!