AR750 - No SSID listing when trying to set as repeater

Just got a brand new AR750 - trying to setup as a repeater there’s plenty of access points in my apartment but nothing gets listed in the drop down list. It just locks up?? any clue why? then it just freezes and restarts

nothing gets listed even though i know there’s around 50 of them here… can someone help?

50 of them? Is this one company providing them?
I suspect they are on a channel above 11 - please confim, or otherwise.

is this a browser issue? Don’t use IE.

If you are using an old firmware, please upgrade to the newest firmware.

Re-install the software perhaps.