Thank you for your assistance. I finally got it working. I had to list the extender as an access point in order for it to connect. It would not connect when I tried listing it as a range extender in the setup. Once connected, I ran through things again to set it up as an extender, and it worked. Also, for some unknown reason (to me) the extender’s IP address is listed as unknown on the status page.
I am unable to even see the range extender. It worked fine with my previous Netgear router. I even ethernet hardwired to the pcWRT router, but it isn’t listed. Yes, it is switched on. A hard reset did not help.