Grouting wet outside of showers
So it looks like you have tile all the way down, and a fiberglass pan. Even if the door was caulked properly, it's entirely possible that the water is wicking through the grout.


Make sure the entire door is caulked
Make sure the place where the tile meets the fiberglass is caulked as well


If either of these are not caulked, go buy a siliconized latex caulk and caulk it again yourself (make SURE it's dry first)