Octopi will not connect to WIFI Extender

Newbie to 3D printing and Octopi so any help welcomed.

Cannot connect Octopi via WIFI Extender

Octopi connects to main wifi router but will not connect to the network when the extender is the target

Logs (syslog, dmesg, ... no logs, no support) Don't know where these are

** The router displays the list of connected devices with Octopi identified by its MAC but with no IP address so it is not active.

I have an Extender which was was planning to use in the workshop to allow my printer to be managed and monitored from the house. I can connect easily if the main router details are entered into the network setup file on Octopi but not when the extender details are entered.

I am having the exact same issue. No problem on a Netgear Router, but it will not connect on a Netgear WiFi extender.