@Vishnu777, no idea why it is not working. It is working fine for all of the members. Try doing basic steps like clearing cache & cookies, logout/login etc. Server sends push notifications upon activate and we have no control over it so i can't check what's wrong.
@Vishnu777 bro, reset chrome settings. And re-enable push notifications. When chrome asks for 'Show notification' then click allow.
If you're using chrome on mobile then tap three dots -->settings --> site settings --> tap 'all site' -->Find 'Dreamdth' --> Tap on it and tap 'clear and reset'. After that restart browser and enable push notification again.