"service instance is bad" - help needed troubleshooting (opens in new tab)

I had a looked in the source code to see where the service instance is bad message is generated\. tvheadend/tvheadend blob/f37b7b2cbcb704f4ff133a57312e69a200648828/src/subscriptions\.c\#L383-L387 It seems to be in response to a SUBSCRIPTION\_BAD\_SERVICE status\. This status does not seem to exist elsewhere within TVH, so I'm assuming that it comes from some external library\. When I did an internet search for SUBSCRIPTION\_BAD\_SERVICE , I was presented with a number of possible causes\. I s...