background
Use the operating system: Ubuntu 18.04
installation is successful from the official website to download the deb file can not be opened.
Online solutions
Koala Ubuntu installation is simply need to install Ruby, but my computer has a view through Ruby installed if you do not have Ruby installed, you can try to install Ruby under...
So, I Ubuntu forums to find an answer: the Just . install libgconf2-4
installation command: sudo apt -y install libgconf2-4after installing open successfully.