Thanks for that.
Unplug the appliance.
You will need to manually remove the water from inside the appliance.
Take the bottom basket and filters out.
Remove all the water from below the filters.
Use a sponge to remove it all.
Look into the now empty sump and on the left side you'll see a cover held by a single screw.
Take the screw out and remove the cover.
This will expose the pump impellor.
Remove any debris jamming the pump impellor.
Turn the impellor to ensure nothing is stopping it.
Refit the cover and screw.
Try the machine again
I've assumed that the drain hose and the connection to the house drains have already been checked for a blockage.
Hope this helps
Let me know how it goes or if you need more help