Invalid Mex-File

I need some help here, please. I use an iMac, Monterey version, Matlab_R2020a. I have installed Xcode per the compiler requirement for this version. However, I keep getting the following error message:

Invalid MEX-file

'/Users/adp/Downloads/MVPANI_V1.0_20211213/decoding_toolbox_v3/decoding_software/libsvm3.12_mod/libsvm3.12/matlab/svmtrain.mexmaci64':

dlopen(/Users/adp/Downloads/MVPANI_V1.0_20211213/decoding_toolbox_v3/decoding_software/libsvm3.12_mod/libsvm3.12/matlab/svmtrain.mexmaci64,

0x0006): Library not loaded: @loader_path/libmex.dylib

Referenced from:

/Users/adp/Downloads/MVPANI_V1.0_20211213/decoding_toolbox_v3/decoding_software/libsvm3.12_mod/libsvm3.12/matlab/svmtrain.mexmaci64

Reason: tried:

'/Users/adp/Downloads/MVPANI_V1.0_20211213/decoding_toolbox_v3/decoding_software/libsvm3.12_mod/libsvm3.12/matlab/libmex.dylib'

(no such file), '/usr/local/lib/libmex.dylib' (no such file),

'/usr/lib/libmex.dylib' (no such file)

Error in SVMMVPA (line 89)

model = svmtrain(train_label,train_data,modelParemter);

Error in MVPANI>ComputeButton_Callback (line 540)

[Accuracy,Predict_test_Label,SpecificitySensitivity,WeightAll,FeatureAll,IX,Specif_Sensit_acc_fold,MaxDim]=SVMMVPA(handles.Cfg);

Error in gui_mainfcn (line 95)

feval(varargin{:});

Error in MVPANI (line 42)

gui_mainfcn(gui_State, varargin{:});

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)MVPANI('ComputeButton_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating UIControl Callback.