If you use Google Chrome as your browser, then you probably don’t know what version you’ve got installed – Chrome automatically updates itself, and doesn’t make a fuss about it. And that’s fine – we’ve all got better things to do than keep track of arbitrary numbers.
But – the current Chrome update (Chrome 45) has a bug that breaks the WordPress admin area.
This post on WPTavern has a description of how to work-around it. It’s a Chrome issue, so you can avoid it by changing the setting in Chrome, or switching to another browser, until a future Chrome release hopefully fixes it.
David Anderson (founder, lead developer, UpdraftPlus)