Before running Juicer for the first time, you should also update to the latest version of Java and scripts from Github by running the following
sudo add-apt-repository -y ppa:webupd8team/java
sudo apt-get update
sudo apt-get install -y oracle-java8-installersudo add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk
java -version