matlab – error while loading shared libraries: libexpat.so.1: file too short

I am trying to install MATLAB_R2020b on Ubuntu 20.04.

1]I extracted the .iso file

2]Then used the chmod -R 777 command because I didn’t have permission to execute the install

3]And finally I ran the install with sudo ./install inside the appropriate folder.

But then I get the following error:

/home/antonis/Downloads/MATLAB_R2020b_Linux64/bin/glnxa64/install_unix: error while loading shared libraries: /home/antonis/Downloads/MATLAB_R2020b_Linux64/bin/glnxa64/libexpat.so.1: file too short

After some searching, I found out that people having the same issue, unzipped the file using the following command:

unzip -X -K matlab_R2020a_glnxa64.zip

However my version of Matlab is in a .iso form so I suppose I can’t use that. Also because I am using a free university license of Matlab, I am forced to download it from the university platform in an .iso form.

I am new to Linux so any help is much appreciated.

Thanks.