I've been trying to update my software to the latest version, but after I opened Software Updater, it shows **Failed to download repository information**. After that, I headed to Software & Updates. After making some changes, it showed that my software cache is out dated and needs to be refreshed. After I pressed yes, it opened the Cache Refresh window. After it ran to 100% (I think) an Ubuntu error report window pops up. After that, it stuck. Is it a bug? Or is it just my computer?

[![The window](https://i.stack.imgur.com/4H2sD.png)](https://i.stack.imgur.com/4H2sD.png)