How can I fix my Delonghi Dishwasher DEDW645S?

Delonghi Dishwasher DEDW645S - E4 Code. Leaking water.
I have replaced tank gasket, but still leaking. The lower door seal appears worn, so have removed top, side panels, friction strip etc to reach lower door seal and remove. It has different grooves to tank gasket. Unable to find lower door seal on parts list to order (refer link) https://www.appliancesupplies.com.au/m/delonghi/dishwasher/dedw645s-9901590017
Very frustrating! Can anyone help?
Thank you.