babel-polyfill has been installed and referenced in main.js, but a blank page is still displayed in IE9. The psychic event is that when I open the control panel to see what the problem is, the refresh page will display normally again, and then turn off the control panel to refresh. However, goose, I re-open a window not to open the control panel to display a blank page, and to open the control panel to display normally. No, no, no. Who has encountered such a bad thing, how to solve it, online urgent and so on!