Bosch Avantixx Dishwasher Problem

[polomints]

I have had this unit for several years with no problems until now.
I use the quick wash programme mostly but on the last three washes it works perfectly until the very end then instead of turning off it shows an error message E22 and the water warning light glows.
The dishes have been washed and dried correctly as normal, turning off the machine and on again with the on/off button clears the display and machine is ready again to use.
I attach a photo.

 

[footprints]

I think your Machine has Aquastop fitted I have one very similar which has it fitted so it may be warning of a leak.
A little video here shows what it does.