Run a cycle of hot water only while the basket is out (if you can catch the water before it overflows) to help flush loose debris down the pipe.
A blocked dishwasher drain often results from a buildup of food particles, grease, or mineral deposits. While standing water in your machine might seem like a major plumbing emergency, most clogs can be cleared with basic household tools and a few simple steps. Essential Tools and Supplies how to clear a blocked dishwasher drain
If your dishwasher drains into your garbage disposal (which is very common), the blockage might actually be in the disposal unit, not the dishwasher. Run a cycle of hot water only while