Constant red light flash and will not start a cycle

Dishwasher is 3 weeks old. Red light constantly flashes
and will not start a cycle. Reset by holding down the start
button and shut power off at the breaker. No change.
Still flashes.

BOSCH SHE68T56UC. less than 2 years old. AUTO and 2:09 lights constantly blinking but could not start the machine. Tried all suggestions - circuit breaker reset, different button combinations tried, drain cleaned to no avail; HOWEVER, when I held down the START button for several seconds the blinking stopped, the readout was 0:00 with a simple small message “CLEAN”. Was able to start up successfully!