What can explain 737 Max 8 crashes?

China, Indonesia and Ethiopia, where the latest crash involving a Boeing 737-Max 8 occurred on Sunday, killing 157 people, have grounded the plane while India’s civil aviation watchdog DGCA has directed Indian carriers to ensure that only pilots with 1,000 hours and co-pilots with 500 hours of flying hours operate the 737 MAX 8.

source https://timesofindia.indiatimes.com/world/what-can-explain-737-max-8-crashes/articleshow/68367539.cms