@Wilson.Wang
..., maybe because it's Comcast/NBC ??
Stan001
Same thought here. Wish the folks at Streamfab would let us know what they were able to determine is/;was the cause.
Just did nine downloads of MSNBC shows as a test. All nine succeeded. Added all nine to queue then downloaded all.
No idea for sure who fixed the issue but pure conjecture on my part makes me think it is/was a Comcast/Xfinity server issue. With literally no communication from the folks at Streamfab the chances of finding out is pretty much zero.
Perhaps the issue will be resolved by Comcast/Xfinity in other areas of the country one server at a time. dunno
I'm keeping my fingers crossed that the issue is now resolved for the Seattle area.
I am not willing to try 6.1.9.7 
again just in case it might screw things up again. For all we know it still could be a Streamfab issue so the cause will most likely remain another secret.
6.1.9.6
NO VPNWindows 11 23H2 OS Build 22631.4037
Comcast/Xfinity Seattle WA
Cloudfare DNS Settings
IPv4 1.1.1.1 primary 1.0.0.1 secondary
IPv6 2606:4700:4700::1111 primary 2606:4700:4700::1001 secondary