Maven error : Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher

Please remove M2_HOME as environment variable, it is already set by the mvn script. The only things you need to do is: add apache-maven-3.x.x/bin to your path, set JAVA_HOME as environment variable. So no need to add %JAVA_HOME%/bin to your path

Try to run mvn -v from /Library/Maven-3.3.3/bin/ folder first to confirm the installation is correct. Try to run mvn with xtrace info (tldp.org/LDP/Bash-Beginners-Guide/html/sect_02_03.html) and verify the commandline built up by Maven. I assume you get an unexpected classpath argument value.

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