Floor soft and flexes

[steplift20]

Hey guys thanks for the advice, what it did today I had a crack in the cabin by the floor so I fiberglass it and I think it's going to be stronger as for the floor ,I have a piece of marine ply wood and cut it yo size and I'm going to glue it down and paint it That should be good I hope it is a small area but I had to address it thanks again guys