Step by step:
1. Go to https://www.mendeley.com/guides/downl....
2. Download and install the latest version of Mendeley.
3. If the Software Installer fail to install Mendeley, do this in Terminal
$ sudo dpkg -i "path-to-downloaded-package"
for example
$ sudo dpkg -i /home/ariefnurpratomo/Downloads/mendeleydesktop_1.19.4-stable_amd64.deb
4. If error happen, when you try to open the Mendeley, It will not working. So, do this thing in Terminal
$ sudo apt-get install -f
This is in order to install python and gconf2 for Mendeley.
5. Try again to open the Mendeley.