Our Bosch dishwasher every few weeks tends to come up with error E22. The filter then has to be cleaned even though it doesn’t look especially clogged. But I imagine your problem is worse than this so the pump may be blocked and it may be worth trying these instructions Bosch give online:-https://www.bosch-home.co.uk/customer-service/get-support/dishwashers/not-draining
Michael David Rowe ● 2061d