had the same problem as you on predator 2.18.
no cabo channels or gran via,checked all the possibiities
but couldn¨t get these channels to clear,although i could
pick up polsat sport(13e in nagravision).
later upgraded to predator 2.19,and still the same problem.
put on sly news on 30w cabo,and waited about 10 mins
to auto update ,but nothing. rebooted, tried gran via,nothing.
rebooted,while still on gran via,and also disconnected power from mains.
waited 2 mins,connected everything,and all channels cleared.
hope this helps.
I have had a dragon card and TM5500 CI PLUS for >6months now and have not succeeded in viewing TV CABO with them. Predator allows access to kiosk channels etc but can never get Cabo. Admittedly I am no expert though I have spent hours and hours trying to research with no joy. Any assistance would be appreciated so my Portuguese wife will finally be silenced.