Password not recognized on satellite RBE970

Sorry for the delay, I was traveling.

Thank you for your feedback. Unfortunately, I've tried everything :(

For various reasons, I can't connect the Orbi devices directly to the internet. So I'm using my local Linux PC.

I started from scratch, with the RBR and the two RBS devices on my desktop:

1. Factory reset of the RBR
2. Wi-Fi connection from my Linux PC to the RBR at 192.168.1.1 (obtaining an IP address of 192.168.1.38 for my PC)
3. Factory reset of the two RBS devices, then waited a few minutes : the two RBS devices were automatically reattached to the RBR (at 192.168.1.38 and 192.168.1.82.

I then want to manually update the RBS devices using files downloaded from the Netgear website.

On the manual update page, when I check the box corresponding to the first RBB and click "UPDATE," a popup appears with the URL 192.168.1.138 of the first RBS, asking for my login/password.

Can you confirm that it is indeed the "admin" / "password" combination?

An important point: due to a bug in the firmware I'm currently using (9.12.2.1), I had to bypass the step involving the two security questions at the beginning of the RBB setup by opening a new tab and "patching" the step number.

I contacted Netgear support at the time, and they confirmed the existence of this bug and that there was no other way around it.

Therefore, I never had to provide a password ! That's why I'm asking about a default password...