You may try to reset the router: with the router fully powered up, press and hold the Reset button with a pin for 10 seconds, then release. The router will reboot itself. Do not disconnect power during the process.
After the router comes back up again, check for WiFi with SSID pcwrt. If you don’t see it, maybe the WiFi is bad.
If the WiFi is bad, but the wired connection is still working on the pcWRT, you can use your other router to as a WiFi Access Point.
Disable Wireless on the pcWRT
Connect your other router’s WAN to a LAN port on the pcWRT.
Switch your other router to Access Point mode. Disable DHCP on the router.
Your devices will connect to the other router’s WiFi, but will sill have Adblock by pcWRT.