You have a leak somewhere.
Unplug m/c
Turn it onto its side, preferably over some old towels or dust sheet etc etc, anything to soak up water, SO do it slowly. Check the pipe work, could find a hole, or a bad fitting, anything. That is most likely. It is coming from somewher under there. find it. Might be some staining, showing where it has come from. replace repair as necessary