after updating from 1.71 to 1.77 today i cannot play as the screen is totally dark

The new updates contain new levels and bug fixes so going backwards is a bad idea. 

Install the latest update and check these threads for tech help: 

https://care.king.com/en/candy-crush-saga/loading-crashing-issues-ios 

https://care.king.com/en/candy-crush-saga/loading-crashing-issues-android 

My update is as new as yesterday. I certainly dont want to go back but I am not able to play either will all black on my screen cannot see any candy anymore. My android is lollipop i.e. 5.1 and was working till yesterday till I updated. I can mail you screenshots with older as well as new version if you want