Check to see of the "design height" was entered as the retained height (thus asking the program for moments and shears above that point - leading to the zeros). There is never any meaningful purpose for specifying the top of a wall as a stem design height.
Instead, set a stem design height at the base of the stem, and at other elevations of interest below the top of the wall, such as at changes in stem thickness, or at rebar cutoff locations, etc.