Web whatsapp qr code scanning

Have only had my PB for a month and loving it so far. Up until yesterday my whatsapp web page worked, QR code loaded and scanned, chats all sync'd. Then I 

WhatsApp Web QR Code: See WhatsApp Chats on …

WhatsApp already uses WhatsApp Web QR Code. On scanning, it allows you to access your chats on a desktop instead of a mobile. WhatsApp is the latest to join the list of social media apps, (Facebook, Instagram) with QR Code feature. This is deemed as a step forward to integrate the app with Instagram. The QR Code is also very similar to the