Depending on where you live your local OTA channel may have been dropped. You should check with your local channel operator. If they dropped the channel Xfinity can't supply, it on cable.

I spoke with a live agent for the 4th time this week. Today I was given a ticket number so IF I need to call in again BAHAAA IF. it should be when !!!! I’m about done. I was told the estimated time of restoration would be 11:08pm. It’s now 1:40 am I

Just chatted with a live agent: "Currently we're in the process of launching WDME (MeTV HD) on the channel with the new broadcasting signals, however there's an issue ongoing with the "not authorized" or "subscription required" message, we're workin

@user_e5ec3e​ This is a helpful post! You are saying that a support agent knew about the problem and was able to give you confirmation they are working on it. That is a positive step forward. Comcast could communicate with their customers proactively

I have the same problem, on 5/11 the channel worked but in the evening on 5/12 access was denied? 

@Wayne1023​ Same here. I got 1048 for a few hours on 5/11 before it disappeared in the evening.