Yahoo Messenger will be discontinued - After July 17, 2018 you will no longer be able to access Yahoo Messenger. Until the end of November 2018 you can download your messages and images to save to your computer or device

Clear your web browser cache on a computer

A web browser's cache stores temporary instances of webpages, allowing them to load faster. This data is supposed to be recreated each time you visit a webpage, but sometimes things go wrong and the data gets corrupt. You can clear your cache (deleting the temporary files) to fix things like outdated pages and webpages freezing, not loading, or being unresponsive.