For us, both Fox News and HGTV are unavailable. Here is the error message we got for both:
"Please try again. We're having some trouble on our end. This channel isn't currently available. Please try tuning away from this channel for a few seconds and then tune back to it. If that doesn't' work, please try again in a few minutes."
This has been at least 3 hours and neither channel works.
The guide is also very slow and sometimes freezes.
I have been having the same problem with the same error message for 2 months. Replaced the box. Didn’t work. Contacted xfinity by phone and went through the refresh, reboot process. That did not fix the issue. Went to the xfinity store a 2nd time and was told a tech could be sent out at a cost of 70.00!! You would think since the error message reads “we are having a problem on our end” xfinity would send a tech to fix the issue without charging the customer.