Video Doorbell Wired Wifi setup fails

Hi, I just bought a doorbell wired and I am not able to complete the configuration. It failed every time after selecting the Home Wifi (connection to the doorbell wifi is successful) . The voice message says to try again with another password(but the password is right....). The wifi signall from the doorbell and the home wifi is strong 5/5 (I am next to them during setup). I tried all the tips I found in the ring community but none of them changed anything: - reset the doodbell - reboot the router (Orange Livebox 4 with latest firmware) - connect through my WiFi Access Point (Asus TR-AC88U) - Use a different device (Samsung A50, Samsung S5e) - Create a guest account with a basic password on the Livebox - Use manual procedure for hidden home wifi - Change the wifi setting : I changed security to mix WPA / WPA2 (default setting is WPA2) I haven't done the port & TCP/UDP protocol opening on my Livebox (NAT), because it is intended for remote access from public Internet and unfortunately I am not yet there... I tried all the tricks I know and found without any success, can you please help me. Brgds,