Why Whatsapp Is Not Working On Wifi. First open Settings and tap Wi-Fi. Sometimes you may try all the above solutions without success.

If the Internet connection is the culprit get Speedify. First open Settings and tap Wi-Fi. In the whatsapp internal settings there is no option which you need to change.
This issue is sporadic and resolves itself in the course of a few minutes.
Ensure the Wi-Fi is on even during the sleep mode. If you are unable to connect on a new Wi-Fi network contact the network administrator. When experiencing issues with WhatsApp calls please try connecting to a different network such as Wi-Fi connection instead of mobile data or vice versa. Usually it should not happen it is surely rare scenario you are.
