The error on screen tells you the problem. Tuner letter and what frequency it cannot get a lock on to.
Sky UK uses:
orbital_position="282"
frequency="11778000"
symbol_rate="27500000"
polarization="1" (Vertical)
fec_inner="0"
inversion="2"
Freesat UK uses:
orbital_position="282"
frequency="11426000"
symbol_rate="27500000"
polarization="0" (Horizontal)
fec_inner="0"
inversion="2"
system="0"
You need to look into your signal reception. Double check with Signal finder that you can get lock on those two frequencies, not just the first one.
Edit:
If you perform a scan of 28.2, you should find 900+ chanenls. If you get less than this there is a problem. Using ABM is not scanning.