well u shud get options to edit SSID settings in this version...
anyway... try upgrading this AP with version --
https://ufile.io/1zkjnversion - zf7372_9.8.2.0.15 i m giving is supported too...
I just checked on R500 with 9.8.2.0.15 and was able to see the options...
post upgrade... if you still dont see the options then perform a hard reset and still if you don't see it... then device is broken... get an RMA