The Miele domestic appliance is reporting an internal fault.
Select Try again in the Miele app.
If the fault continues to occur, proceed as follows:
Cancel the connection process in the Miele app.
Reset the network settings on the Miele domestic appliance to the factory defaults:
Select the Miele@home or Networking menu on the Miele domestic appliance.
Select the Reset menu.
Disconnect the domestic appliance from the power supply.
Wait 15 minutes.
Add the Miele domestic appliance again in the Miele app.