WhatsApp is totally unusable for Xiaomi phone users in India since morning.
If you are affected, chances are that even uninstalling and installing the WhatsApp app won’t work (it didn’t for me).
The company is working on a fix and while they are it, maybe time for you to go outside and meet real friends?
Fix : Download the apk from WhatsApp.com/android and see if it works for you.
PS: We will update when the official fix is available.