How to extrude to a twisted face.

Hi, I am trying to extrude a rectangle to a twisted body (sketch 6 down to body). But it gives me an error saying that the body does no terminate the extrusion.

And also, for the flex, I wanted one side to form an angle of 87.51,and the other side is 89.7 but it seems ike the angles that I got are not right.

I have included a sample of the completed part(cant edit) and the model that I am working on.

Thanks for your time. <3 <3 <3

SolidworksParts And Features