Why BlockerHero suddenly stops working?

This is because your mobile has an inbuilt battery optimation system that is killing apps from the background quite frequently and BlockerHero is also killed so now what you do to solve your issue you need to make 2 changes to run BlockerHero forever.
Step1: Turn On AutoStart
Step2: Turn Off Battery Optimization
To Follow the above step you need to search on google –
1. How to Turn ON AutoStart in YOUR_BRAND_NAME_HERE?
2. How to Turn OFF Battery optimization in YOUR_BRAND_NAME_HERE?