AutoSleep. 
Health Check. 

The Apple Health database (HealthKit) is reporting a system error with your heart rate data. 


The first thing to try is to power the iPhone and Watch off and on as per these links. i.e. Shut down completely and restart. 

iPhone: https://support.apple.com/en-au/HT201559

Watch: https://support.apple.com/en-au/HT204510



If this does not solve the problem then it may be an app installation problem or system corrupted health permissions.  

It’s very important to perform all these steps in the exact order. 

***Especially 2 & 3 are these cause crashed Apple OS services to restart.***

  1. Delete the AutoSleep iPhone app. Make sure you keep any data associated with it when it asks though. Note when you delete the app you get questions. The Keep question is the 2nd one. 
  2. Power the iPhone off and on. i.e. Completely off and then back on as per this link. https://support.apple.com/en-au/HT201559
  3. Power the Watch off and on. https://support.apple.com/en-au/HT204510
  4. Download the AutoSleep iPhone app again. 
  5. Start the AutoSleep iPhone app and go through the setup process carefully accepting permissions. MAKE SURE THAT ALL SWITCHES ARE TURNED ON when asked about health permissions. 
  6. After about 5 minutes, install the Apple Watch app (if required).