Hello Laurie, thank you for your post!
Based off what you have described your Electrolux wall oven will not start self-clean due to the oven stating the racks need to be removed. You may need to perform a reset on the oven to clear out the code. A reset can be done by disconnecting power from the oven for at least ten minutes this can usually be done by flipping the household circuit breaker off. If that does not help to correct the issue you may need to have a professional out to your home for a proper diagnosis and repair. -Matt