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Follow instructions to install Java: Install Java https://phixflow.atlassian.net/wiki/pages/createpage.action?spaceKey=HELP83&title=Install%20Java%20OLD
Update JAVA_HOME
If you have set the environment variable JAVA_HOME, check whether this needs updating in the system environment variables. Commonly this will be automatically updated by the installation process.
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If you have moved between major versions of Java (e.g. you are moving from Java 8 to Java 11), update the Java arguments CATALINA_OPTS as instructed here: Install Tomcat on Linux
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