No problem, I understand.
However, without the information requested in my previous response, I can only give you a general answer however, I hope this helps.
Please try this to unlock the door:
Please unplug the appliance and remove the bottom front flap.
Keep some beach towels and shallow container under the filter.
Then rotate the drain pump filter anti clockwise to open, clean it completely and make sure it is not clogged.
Now, with your fingers check if impellor rotates.
Then you will see a pull tab next to the filter, pull it to open the door.
Now, reconnect everything and plug it back.
Then try an empty wash cycle and if the error returns, I am afraid door lock is faulty and will need replacement.
Alternatively, you may call Bosch at 03448 928 979 to book repair.
If there is anything else I can help you with, please let me know.