it means that your game is not complete/installing correctly, if that is the case then your issues with wherever you got it from warrant them replacing it.
Here you go, seperate model and texture. Can be added/assigned to the model easily.
bumper.rar
model by MikeyPI
texture by Hoppah
Make sure to credit original authors of models when posting pictures and more importantly, when you're releasing your modification.
Yours sincerely,
Hoppah
EMP Staff
Special Needs Department