Bauknecht error before opening soap compartment

I have a bauknecht dishwasher type GSX47564TW. The service number is 854675601510. The problem is that just prior and sometimes after opening the soap compartement, the machine starts beeping. The beeps and the led are continous. It’s not like two blinks and a pause.

I already tried to replace the temperature probe, but this didn’t solve it.

Can anybody tell me what this error means, and what should be the sequence of events (like filling-spraying-pumping-opening compartment etc.)