need to install adobe flash player
One, it can be installed by a third party, refer to https://jingyan.baidu.com/article/3c48dd34a2952ee10be35820.html
The steps are as follows:
1. Open the terminal: ctrl+alt+T to open the terminal controller
2. Update the source list: sudo apt-get update
3, then update flashplayer, enter the command: sudo apt-get install flashplugin-install. Enter
4, enter "y"
Second, I installed it using the software center that comes with ubuntu.