How to fix Whatsapp isn’t responding.Do you want to close it? in android

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How to fix Whatsapp isn’t responding.Do you want to close it? in android-I try to delete one group chat in whatsapp but my android shows following error:
whatsapp isn’t responding do you want to close it-whatsapp is not responding do you want to close it,this error is mostly occurred in micromax,samsung,moto e,moto g,moto x,htc,panasonic,gionee,sony,lenovo,etc…

Solution:
Goto settings-apps-all-whatsapp
click “clear data” option.
now again goto access it-whatsapp.
The previous chat is now deleted.
The error is also fixed.

Source: Youtube