Home Connect App does not connect

Hello, needed times advice! Have a new Siemens EQ7 Integral TQ707D03! Now I wanted to connect the machine with the WLAN! In the Home Connect app, the machine has also been detected! If I then press Add, the app searches for the machine, which is also found, as connection with the home appliance appears! Then the little house flashes about 15 SEC. , and it comes the message, Bluetooth connection lost! Also under Bluetooth, the machine is displayed to me as TQ707D03, pairing is not possible, however, because a PIN is required! What can I do now, that it works after all? Thanks for your support! LG Stefan

Problem solved! Finally, a factory reset helped! Connected to the Home Connect app without any problems afterwards!