Hi @OneTech IT,
A JRE is not enough, you need a full JDK as detailed in the prerequisites paragraph of this page: https://confluence.atlassian.com/crowd/installing-crowd-and-crowdid-191862.html
Then set a JAVA_HOME environment variable and point it to your JDK path. You can declare it in apache-tomcat/bin/setenv.sh if you don't want to do it in your bash profile.
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