Saw water leaking from below the diverter valve assembly; specifically below the motor that is attached to the diverter valve assembly. Initial thought was to replace the rubber O ring around the diverter valve because the rubber ring might have been worn out after so many years of use but later decided to replace the entire assembly, which was the right choice because after removing and disassembling the diverter valve, it revealed there is another smaller rubber O ring inside, which was the actual root cause of the leak.
Since it took quite a while to replace the parts, one would only want to take the dishwasher apart once, as opposed to replacing the larger O ring and found that it still leaks and had to go back to replace the whole assembly again, which contains the smaller O ring, which was the real cause of the leak.