Error installing geogig

[FedericoRapp]

Hello, I was trying to install geogig in my local server (ubuntu 18.04) and followed the steps from here and I received this error when I run in terminal
gismab@gismab:/tmp$ geogig --help Error: no se ha encontrado o cargado la clase principal org.locationtech.geogig.cli.app.CLI

I think is something related with my java installation or my JAVA_HOME or PATH environment variables.

gismab@gismab:/tmp$ echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/share:/opt/geogig/bin
gismab@gismab:/tmp$ echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/share:/opt/geogig/bin
I really need help here. Sorry about my poor english.