NSA326 GoogleDriveClient (Zyxel Cloud Sync) can not auth

Hello,
at Google the OAuth out-of-band (OOB) flow was deprecated on October 3, 2022, however my NSA326 with the latest firmware still trying to use it when I try to setup the connection:"redirect_uri=urn:ietf:wg:oauth:2.0:oob"
Can you advise what I can do in this case?Thank you
Laszlo

(I also sent a mail to the contact person that was recommended by the google site:

zyxel.cloudadm@gmail.com)