Hey Sas,
I understand that you are having an issue while installing Matlab libraries R2021b, you get the error "exec error 13".
Here are some troubleshooting steps you can follow-
1. Make sure there is no anti-virus blocking the install. Disable the antivirus and try installing the libraries again.
2. Verify the permissions on the installation files are set to read and execute. If they are set to read only, you will likely encounter this error. This is more likely to happen when the files are hosted on a network shared drive.
I hope this helps!
