I invite you to contact the customer service for this :)

Hello, Steffen has removed this item from the range and deleted the app.
have the Wifi Pilot with the app from Rittig running, goes great!!!

Have 4 products from Steffen with WiFi Pilot, worked fine until IOS update 15.3.1. Now no more!
I would be very interested to know if Steffen can fix it?

Same problem with Android. I can't login to the app. "Request time out. Please try again!"
Looks like I'll be switching to Philips Hue