Hi! JavaScript is a browser feature for running Java-based web applications. It usually happens in web browsers. Which browser are you using?
Disable third-party extensions, especially ad-blocking ones.
Try in another browser, such as Microsoft Edge.
Check if JavaScript is enabled in your browser. Go to Settings > Privacy and Security > Site settings > JavaScript > Check Sites can use JavaScript > See if any sites are blocked under Blocked Sites. If you are in a school environment, or using an educational computer, the network or computer's proxy or firewall may interfere. You should contact the school's IT team.