Facing Error in CVX_matlab log_normcdf() function

in MATLAB Version: 9.12.0.1884302 (R2022a)

Using CVX_Matlab:

CVX: Software for Disciplined Convex Programming (c)2014 CVX Research

Version 3.0beta, Build 1183 (dda2109)

I get Error when using this Code:

clc;clear;close all;


% Load Data From team_data.m file in the directory
team_data;
A1 = sparse(1:m,train(:,1),train(:,3),m,n);
A2 = sparse(1:m,train(:,2),-train(:,3),m,n);
A = A1+A2;


cvx_begin
variable a_hat(n)
    minimize(-sum(log_normcdf(A*a_hat/sigma)))
    subject to
        a_hat >= 0
        a_hat <= 1
cvx_end

%%

The Error happens when using --> log_normcdf(A*a_hat/sigma) --->

which says:

****************************************************************

Unrecognized function or variable 'vx'.

Error in cvx_binary_op (line 48)

vx = repmat( reshape( vx, sx ), bx );

Error in - (line 27)

z = cvx_binary_op( P, x, y );

Error in cvx/bsxfun (line 7)

z = func( x, y, varargin{:} );

Error in log_normcdf>log_normcdf_cncv (line 52)

y = bsxfun( @times, a, bsxfun( @minus, b, x ) );

Error in cvx_unary_op (line 29)

y = p.funcs{abs(vu)}( vec(x), varargin{:} );

Error in log_normcdf (line 36)

y = cvx_unary_op( P, x );

****************************************************************

Can anyone help me?