Kenwood dishwasher e4
Most likely, the flood guard is activated. This happens when there is water at the bottom. This can be dangerous, because there are pumps and electrical components. Disconnect the machine from the mains. Pull your dishwasher forward, put a tub/tray and spread towels behind it and then tilt it back at a 45 degree angle. Wait until water pours out. Run a cycle. If the error is not going away, you need to check the entire system for leaks.