Yeah, I wrestled with including this step, but I wanted to keep it mostly straightforward for relatively non-technical users. I have a different network level ad blocker and love it.
roku chromecast https://ba.net/adblock/vpn/roku-chromecast-fix.html
If you don’t mind sharing, what is it? Pihole is so good, but if you’ve chosen something you see as better, I’m all ears.