He took the lid off and noticed that the pipe fit loosely in the hole. So, he sealed it up good with white silicone.
Today we had a nice rainy wintry mix. So, we had a good opportunity to see how the fix worked. Well, there was no water in the cabinets. So, that is an improvement. But, there is still a drip on the right side above the area where we keep our shoes. So, we are well on our way to getting the problem completely fixed.