Same result here.So I just went ahead and tried. installed new driver 18.104.22.168 and run MP debug mde:
1. tune to RTL4 (is subscription) -> no 'channel scrambled' but 'unable to build graph'
2. tune to NED1 (is FTA) -> works
3. tune to RTL5 (is subscription) -> same as 1.
FTA channel works, subscription channel don't. :-/