This error may occur for various reasons, such as:
- The installer or installation files are located in a directory containing accented or double-byte characters (e.g., Korean).
- VPN is enabled on the system.
- Issues with setting up the MATLAB path.
Please refer to the following MATLAB Answers post, where solutions are provided to solve this issue: https://in.mathworks.com/matlabcentral/answers/521132-unable-to-open-the-requested-feature-check-your-internet-connection-and-proxy-settings-in-matlab-we?s_tid=srchtitle