Unknown Access Violation Error

[DllImport(Dlls.AeroxWidgetsNative, EntryPoint = "msdfRenderContext",CallingConvention = CallingConvention.Cdecl)]
    private static extern IntPtr NativeNewContext();

struct GlyphContext
{
    msdfgen::Point2 position{};
    msdfgen::Shape * shape;
    msdfgen::Contour * contour;
    GlyphContext();
    ~GlyphContext();
};


EXPORT GlyphContext * msdfNewContext();

GlyphContext * msdfNewContext()
{
    return new GlyphContext();
}