I am getting a 403 Playback Failed message on some channels periodically. Such as Magnolia, Food, HGTV,DIY, etc. The channels are on FUBO and I am using a Raspberry Pi DVR server/tuner. The message will not play those channels live and skips recordings. The channels all play in the FUBO app. The message has more info about something being missing.
A 403 error is means Forbidden, which essentially means that you are not authorized to access that file. This usually points to a TV Everywhere authentication issue; ensure you are on the latest DVR pre-release, and try reauthenticating those specific channels individually.
The streams Channels uses come from the individual network websites, not your cable/OTT provider. To verify you do have access, attempt to stream from the networks' websites, as that is what Channels is doing.
There is another thread with more info: