Yesterday my Lumia 640 Dual Sim updated to Windows Phone 10.0.15063.251 and today WhatsApp installed an update.
When I attempt to launch WhatsApp, I am taken back to the phone's home screen immediately. However, the app seems to work in the background, as I continue to receive the WhatsApp notifications at the top of the screen.
Every time I reboot my phone, the following message is displayed at the top of the screen (translated below):
Willkommen zu Nachrichten+ Eine bessere Möglichkeit, SMS zu schreiben, zu chatten und Inhalte zu teilen
Welcome to Messages+ A better possibility to write text messages, chat and share content
I think that the message comes from this app. However, the app is nowhere to be found in the list of installed apps and I still have the old Message app with the same tile icon as before.
Any suggestions how to fix the problem are welcome.