Doesn't work properly

[ningguoxu]

An error message is reported
[ERROR] Failed to execute goal com.github.akman:jpackage-maven-plugin:0.1.5:jpackage (default-cli) on project demo: Execution default-cli of goal com.github.akman:jpackage-maven-plugin:0.1.5:jpackage failed: Unsupported class file major version 66 -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException