Jetsystem blocked.

I had the same problem, if you undo the self adjusting clip that holds the drum seal in - then pull back the top of the seal near the nozzle thats blocked, this will reveal the pipework attached to the nozzle.
Then use a pipe cleaner and push up through nozzle - the attached pipe is clear so you will see any gunge and be able to loosen the debris.
After cleaning reassemble seal then run a empty cycle which will clear the loosened debris.
Regards,
Grant