This sub surface was not in the same plane as its base surface.

edit

Both "U_1K03" and "U_1K04" have duplicates (i.e. 2x instances of each in the IDF).

In addition, subsurfaces must link an opaque (base) surface; those are missing in both "U_1K03" instances, and in one instance of "U_1K04". The other "U_1K04" instance does reference a base surface, "U_1D02":

FenestrationSurface:Detailed,
    U_1K04,  !- Name
    Window,  !- Surface Type
    Exterior Window,  !- Construction Name
    U_1D02,  !- Building Surface Name
    ,  !- Outside Boundary Condition Object
    ,  !- View Factor to Ground
    ,  !- Frame and Divider Name
    ,  !- Multiplier
    4,  !- Number of Vertices

Yet there are also 2x instances of "U_1D02" in the IDF: one facing outdoors, the other facing another surface, "1733D2".

I suspect you're after the latter: 2x matching interior walls. When matched interior surfaces reference each other this way, their coupled subsurfaces must also reference each other as outside boundary condition objects. I suspect the 4x subsurface instances were meant to represent 2x pairs of matching subsurfaces. I haven't looked into the vertices; nonetheless, try the following corrections:

• single instance for each object
• a unique name for each instance
• ensure subsurfaces link base surfaces
• ensure matching subsurfaces reference each other
• finally ensure coupled sets of vertices match, and that they're in the correct order