Playback failed!

I get an error message of Playback Failed when trying to watch anything on the Channels App on my Firestick 4k. I can watch local channels with the HDHomerun app, and I can also watch my Philo channels with the Philo app, but I cannot watch any of them on the Channels App without receiving this message. I have recently connected my Ready Nas DVR to a new network since we moved, but it is showing the correct IP address on the Channels App settings.

Try stopping the app from FireTV settings under Apps

Just tried that. I can now watch what is picked up via the HDHomerun tuner, but it appears as if it may be an issue with the Philo connection. The Philo channels still do the same thing.

You will need to check the DVR log via the web UI on your PC

DVR log shows:
stream timestamps: mtv: start_at=2020-09-23T12:05:06-05:00 current_at=2020-09-23T12:05:22-05:00 end_at=2020-09-23T12:05:26-05:00
2020/09/23 12:05:08.659037 [TNR] Opened connection to TVE-Philo for ch6012 MTV [transcode=none]
2020/09/23 12:05:46.220702 [ERR] Error during stream TVE-Philo ch6012 MTV: Failed to download file: https://x-viacom-stgec.uplynk.com/ausw/slices/eb2/4f59ea65df184a2580ad8fc80d3eaa32/eb24f97d958b4ccf9aa9211cc193ec76/G00000009.ts?pbs=c1ae2bab5149453286c924b2916d37ac&_jt=l&euid=9bb4d44b-ace1-495c-8e07-9dfb306bcd7d&chid=aba50cebb8f84fbead72cf7d26217a36&cloud=aws&oid=ccc958034db04235b1e90e769d230296&is_ad=1&si=1: hls: Timeout while waiting for data
2020/09/23 12:05:46.221882 [TNR] Closed connection to TVE-Philo for ch6012 MTV
2020/09/23 12:06:13.236569 [TVE] stream timestamps: tvland: start_at=2020-09-23T12:06:12-05:00 current_at=2020-09-23T12:06:33-05:00 end_at=2020-09-23T12:06:41-05:00
2020/09/23 12:06:13.236626 [TNR] Opened connection to TVE-Philo for ch6020 TVLAND [transcode=none]
2020/09/23 12:06:50.014597 [ERR] Error during stream TVE-Philo ch6020 TVLAND: Failed to download file: https://x-viacom-stgec.uplynk.com/ause/slices/204/ccc958034db04235b1e90e769d230296/2049bb3b9c974fcea04c43cadd9abfdb/F0000004B.ts?pbs=ddfbb3bbff1d4a1ea42bbcdaac213e5d&_jt=l&euid=e5fb41b7-04dc-43e3-b008-9ae21ce7d534&chid=1891d223a2964486bcf81817f4977eed&cloud=aws&si=0: Get "https://x-viacom-stgec.uplynk.com/ause/slices/204/ccc958034db04235b1e90e769d230296/2049bb3b9c974fcea04c43cadd9abfdb/F0000004B.ts?pbs=ddfbb3bbff1d4a1ea42bbcdaac213e5d&_jt=l&euid=e5fb41b7-04dc-43e3-b008-9ae21ce7d534&chid=1891d223a2964486bcf81817f4977eed&cloud=aws&si=0": dial tcp: lookup x-viacom-stgec.uplynk.com on [fe80::7829:edff:fe68:72b0]:53: dial udp [fe80::7829:edff:fe68:72b0]:53: connect: invalid argument
2020/09/23 12:06:50.016327 [TNR] Closed connection to TVE-Philo for ch6020 TVLAND.

I deleted the Philo connection and reloaded it. I also received the error message "Tunner Not Responding"

I also submitted a new diagnostic.

Are you running a VPN on your DVR PC?

Looks like you have an invalid ipv6 DNS server configured

No VPN running. How do I fix the DNS Issue?

Open the Network settings on your PC and check what DNS is configured to

IPv6 DNS servers: 2605:6000:1702:c26c::1

This one?