With the release of the v3.7.7.0 firmware for the WNDAP260, which in theory only fixed the WPA2 handshake "KRACK" issues, the WMS5316 controller can no longer authenticate the APs. Reverting to v3.6....
I believe this is still being worked on. The latest firmware v3.7.9.0 fixed issues indicated in the release notes here.
Regards,
DaneA
NETGEAR Community Team