What the symptom can mean
A restricted waste route, impaired pumping or an interrupted programme can all leave water behind. Drainage and completion need checking together before a part is identified.
Record the last stage
Keep the programme name, final display and visible water level together. Say whether the machine had reached its normal final spin or stopped earlier. If there was a warning, copy every character before searching for an interpretation.
Compare water with wet laundry
Water visible through the door is different from an emptied drum containing heavy wet towels. Include whether you heard the usual emptying sound and whether the nearby sink was behaving differently at the time.