First impression, without more information, is that your grind was more than a little coarser; perhaps much courser. Go back to original grind for comparision. This machine is usually VERY reliable so first place to look for solutions is changes in your bahavior (no criticism intended). If the machine were losing pressure, it would most likely happen over a longer period, signalling a need for descaling. Sudden complete lose of pressure would be from a pump, valve, or fitting often with a lot of water leaking out (except for pump failure).