You have a problem with the water coming into the appliance – ‘3’ in the display indicates a fill time out.
You will need to be looking at your incoming water pressure , both hot and cold , maybe checking the filters in the hose connections where they connect to the machine. Failing this , you may have a faulty valve on the valve assembly.
If you’re handy with a multimeter , you could check the valves for resistance – approx 3.6 to 4.5kohms – Open circuit on one of these valves would mean a replacement valve set.
POWER OFF IF TESTING/INVESTIGATING