We bought the above machine from you a little over a year ago and I just got an error message and the machine will no longer work. The message is E 05 "Restart to Solve". Pressing the power button does nothing, and unplugging, waiting, and then replugging the machine in still show the error and it still doesn't work. I don't seem to be able to remove the brew group. I have been washing and lubricating it regularly, but it seems stuck in the machine at this point. Any ideas?