The screws are Torx security screws.
I'm afraid that on your machine, the front has to come off to get to the pump housing.
There is no method of draining the trapped water out first that I can see on your machine.
Unplug the appliance.
Take the dispenser out.
Take out any screws revealed.
Open the door.
Take the door seal retainer out and peel the seal off the front panel.
Take the screws out of the door lock.
Tilt the machine back and take the screws holding the front panel on out.
Take the front panel off.
Have someone hold the machine for you, tilted as far back, rearward, as possible.
Take the pump out.
Disconnect the hoses and wiring.
(Use a wash basin to catch any spilled water).
Clean out the debris in the pump and in the hoses.
Reassemble the appliance and try it again.
If the machine is under 2 years old, it should still be under warranty with Bosch (if you have proof of purchase).
However, it may be that a blocked pump isn't covered by warranty.
Check it out, see what you find.
Good luck with the repair.