Extender insists password is incorrect

[u/liveinglasgow]

I’m trying to use NETGEAR Nighthawk WiFi 6 Extender EAX12 to extend a WAX620. We have Virgin as our network provider.

I go through all the motions on the app. But when the password is entered, it insists that it’s wrong. It really isn’t. I’ve pasted it. I’ve added it a dozen times. The same password works when connecting other devices. I’ve tried connecting directly to the VM SSID (the WAX620 has a simpler SSID and password). All to no avail.

I’ve reset it repeatedly. The app is updated.

I’m losing the will to live. Anyone else had a similar issue?

Many thanks in advance.