Check water light in your dishwasher indicates, water has leaked in the base of appliance and activated the anti-flood device.
You will have to unplug the appliance and pull it out, then tip it backwards by around 45 degrees so excess water drains off completely.
After you have done this, check the drain hose where it connects to house drain and make sure it is not clogged.
Then please clean the mesh filter from inside and make sure it is not blocked.
Now, reconnect everything and plug it back; select any program.
It should work however, if the problem occurs again you will have to replace the flow sensor and/or aquastop valve to solve the issue.
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.