- Make sure that your MathWorks Account is active and that your MATLAB license is linked to your account. You can check this by logging into your account on the MathWorks website. Here is the link - https://in.mathworks.com/licensecenter/licenses/add?s_tid=gn_aslc#
- Sometimes, firewall or antivirus software can interfere with the installation process. Try disabling these temporarily and see if you can install the toolbox. Remember to enable them back after you are done.
- If you are on a corporate or university network, there might be restrictions that are preventing the installation. If possible, try using a different network or contact your license administrator (someone in your school or company's IT department) and ask them for permission to download, install, and use “Statistics and Machine Learning Toolbox”.
- The following MATLAB Answer link could help in addressing your situation. Check out the answer provided by MathWorks Support Team- https://in.mathworks.com/matlabcentral/answers/101885-how-do-i-install-additional-toolboxes-into-an-existing-installation-of-matlab
- https://in.mathworks.com/matlabcentral/answers/881693-how-do-i-install-statistics-and-machine-learning-toolbox-into-an-existing-installation-of-matlab?s_tid=srchtitle
- https://in.mathworks.com/matlabcentral/answers/271916-how-to-download-a-particular-toolbox-of-matlab
- https://in.mathworks.com/help/matlab/add-ons.html