Re: indesit DV620 dishwasher
The base of the dishwasher has flooded in that case activating the flood protection. You could try leaning the dishwasher and see if any water runs out (towels handy ;)) once emptied it may run again.
There may well be an underlying leak causing this of course which needs investigating and resolving.
Power off if you decide to look further :zap: or check the repairs@ link below for an engineer should you need one 🙂
Dave.