Matlab encounteres an internal problem when l access to a specific variables in a ".mat" file that contains data from "RealSense Depth D435" camera

I am using "RealSense Depth D435" camera - and I am running the code "depth_example.m" that I found here https://github.com/IntelRealSense/librealsense/tree/master/wrappers/matlab

I added a line to the code in order to save the the variable "fs" in a ".mat" file. The line that I added is :

save('fs');

When I am loading 'fs.mat' and trying to access specific variables in struct "fs", such as "get_depth_frame" - Matlab stop working and I get this error:

"Matlab has encountered an Internal problem and needs to close.".

This is the code that I am running when I get an error:

x = load('fs.mat');

x.fs.get_depth_frame;

This is the code that I am running in order to save "fs":

function depth_example()

% Make Pipeline object to manage streaming

pipe = realsense.pipeline();

% Make Colorizer object to prettify depth output

colorizer = realsense.colorizer();

% Start streaming on an arbitrary camera with default settings

profile = pipe.start();

% Get streaming device's name

dev = profile.get_device();

name = dev.get_info(realsense.camera_info.name);

% Get frames. We discard the first couple to allow

% the camera time to settle

for i = 1:5

fs = pipe.wait_for_frames();

% Select depth frame

depth = fs.get_depth_frame();

% Colorize depth frame

color = colorizer.colorize(depth);

% Get actual data and convert into a format imshow can use

% (Color data arrives as [R, G, B, R, G, B, ...] vector)

data = color.get_data();

img = permute(reshape(data',[3,color.get_width(),color.get_height()]),[3 2 1]);

% Display image

imshow(img);

title(sprintf("Colorized depth frame from %s", name));

save('fs');

end

pipe.stop();

end