Bosch soap dispenser issue

Dishwasher Repair
1

Brand: Bosch
Model Number: SHE7PT55UC/07
Main Symptom: Soap dispenser won’t open
What happens & when: Dispenser won’t open for wash cycle

Error Code (if any): none
Parts or tests already tried: Replaced dispenser
Photos / video link:

2

When the dispenser door unlock button is pressed, does the door open freely or does it have to be assisted in opening? This can help identify if there is a mechanical failure or an electronic failure.