- Check the internet conection: Ensure that the internet connection is stable and working properly.
- Disable Firewall and Antivirus temporarily: The firewall or antivirus software might be blocking the connection to MathWorks servers. Temporarily disable these security features and try running the installer again.
- Use a different network: If possible, try using a different network connection. For example, if using a corporate network, switch to a home network or a mobile hotspot.
- Download the installer again: The installer file might be corrupted. Download a fresh copy of the installer from the MathWorks website.
- Use the Offline Installer: If the online installer continues to fail, use the offline installer. This method does not require constant internet access during the installation process. The Offline Installer can be found in the downloads page in MathWorks website.
- Check Proxy Settings: If behind a proxy server, make sure that the proxy settings are correctly configured in the system. Navigate to Control Panel > Internet Options > Connection tab > LAN settings and ensure that the proxy settings are correctly configured.
- Run the Installer as Administrator: Running the installer with administrative privileges can sometimes resolve permissions-related issues.
- Persistent error messages upon opening new MATLAB R2020a download (ML Answers): https://www.mathworks.com/support/search.html/answers/575278-persistent-error-messages-upon-opening-new-matlab-r2020a-download.html?fq%5B%5D=asset_type_name:answer&fq%5B%5D=category:support/downloads3041&page=1
- Missing file error while installing MATLAB R2020a (ML Answers): https://www.mathworks.com/support/search.html/answers/515687-missing-file-error-while-installing-matlab-r2020a.html?fq%5B%5D=asset_type_name:answer&fq%5B%5D=category:support/introduct1740&page=1