Indesit DISR 15b1 not working

Hi. My Indesit DISR 14B1 dishwasher has stopped working.

It powers in ok, and I can scroll between programs ok using the P button.

when I close the door , I get the beep and it sounds as though water is getting pumped, but then it’s stops and does no more .

Cleaned inside filters and all looks ok and clean.

I’ve read about the anti flood switch, so have removed plinth and my door.

There are 2 screws on a plastic plinth attached to dishwasher at the bottom, and a small oval panel of which I’ve removed but the plastic panel doesn’t look as tho it will move.

Do I need to remove the metal door plate to investigate inside ?

Thanks in advance Shaun