[ryupuriwat]

This is how I set up in cfg file for FFD BOX. Could anyone please tell me what I have done is wrong so that I cannot get FFD_SURFACE_POINTS (FFD_SURFACE_POINTS=0)
% Tolerance of the Free-Form Deformation point inversion
FFD_TOLERANCE= 1E-10
%
% Maximum number of iterations in the Free-Form Deformation point inversion
FFD_ITERATIONS= 500
%
% FFD box definition: 3D case (FFD_BoxTag, X1, Y1, Z1, X2, Y2, Z2, X3, Y3, Z3, X4, Y4, Z4,
% X5, Y5, Z5, X6, Y6, Z6, X7, Y7, Z7, X8, Y8, Z8)
FFD_DEFINITION= (AIRFOIL_BOX, -0.01, -1.2, 0.0, -0.01, 1.2, 0.0, 1.01, 1.2, 0.0, 1.01, -1.2, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
%
% FFD box degree: 3D case (x_degree, y_degree, z_degree)
% 2D case (x_degree, y_degree, 0)
FFD_DEGREE= (10, 1, 0)
%
% Surface grid continuity at the intersection with the faces of the FFD boxes.
% To keep a particular level of surface continuity, SU2 automatically freezes the right
% number of control point planes (NO_DERIVATIVE, 1ST_DERIVATIVE, 2ND_DERIVATIVE, USER_INPUT)
FFD_CONTINUITY= 2ND_DERIVATIVE
%
% There is a symmetry plane (j=0) for all the FFD boxes (YES, NO)
FFD_SYMMETRY_PLANE= YES

% ----------------------- DESIGN VARIABLE PARAMETERS --------------------------%
% Kind of deformation (FFD_SETTING, FFD_CONTROL_POINT_2D, FFD_CAMBER_2D, FFD_THICKNESS_2D,
% HICKS_HENNE, PARABOLIC,
% NACA_4DIGITS, DISPLACEMENT, ROTATION, FFD_CONTROL_POINT,
% FFD_NACELLE, FFD_TWIST, FFD_ROTATION,
% FFD_CAMBER, FFD_THICKNESS, SURFACE_FILE)
DV_KIND= FFD_SETTING
%
% Marker of the surface to which we are going apply the shape deformation
DV_MARKER= ( AIRFOIL )
%
% Parameters of the shape deformation
% - HICKS_HENNE ( Lower Surface (0)/Upper Surface (1)/Only one Surface (2), x_Loc )
% - NACA_4DIGITS ( 1st digit, 2nd digit, 3rd and 4th digit )
% - PARABOLIC ( Center, Thickness )
% - DISPLACEMENT ( x_Disp, y_Disp, z_Disp )
% - ROTATION ( x_Orig, y_Orig, z_Orig, x_End, y_End, z_End )
% - OBSTACLE ( Center, Bump size )
% - FFD_CONTROL_POINT ( FFD_BoxTag ID, i_Ind, j_Ind, k_Ind, x_Disp, y_Disp, z_Disp )
% - FFD_DIHEDRAL_ANGLE ( FFD_BoxTag ID, x_Orig, y_Orig, z_Orig, x_End, y_End, z_End )
% - FFD_TWIST_ANGLE ( FFD_BoxTag ID, x_Orig, y_Orig, z_Orig, x_End, y_End, z_End )
% - FFD_ROTATION ( FFD_BoxTag ID, x_Orig, y_Orig, z_Orig, x_End, y_End, z_End )
% - FFD_CAMBER ( FFD_BoxTag ID, i_Ind, j_Ind )
% - FFD_THICKNESS ( FFD_BoxTag ID, i_Ind, j_Ind )
% - FFD_VOLUME ( FFD_BoxTag ID, i_Ind, j_Ind )
DV_PARAM= 1.0
%
% New value of the shape deformation
DV_VALUE= 0.01

[pcg]

The order of the points is causing this, we will introduce a helpful error message (https://github.com/su2code/SU2/issues/2025) try
-0.01, -1.2, 0.0, 1.01, -1.2, 0.0, 1.01, 1.2, 0.0, -0.01, 1.2, 0.0, ...