The following stack trace can be seen in the logs:

2014-10-13 14:23:35,539 ERROR [ThreadPoolAsyncTaskExecutor::Thread 37][plugin.osgi.factory.OsgiPlugin] onPluginContainerFailed Unable to start the plugin container for plugin net.customware.confluence.plugin.scaffolding org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class[net.customware.confluence.plugin.scaffolding.admin.AdminConfiguration] for bean with name 'adminConfiguration' defined in URL [bundle://211.0:1/net/customware/confluence/plugin/scaffolding/admin/AdminConfiguration.class]: problem with class file or dependent class; nested exception is java.lang.UnsupportedClassVersionError: net/customware/confluence/plugin/scaffolding/admin/AdminConfiguration : Unsupported major.minor version 51.0 at at at at at at at$1600( at$ at org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL( at at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$ at java.util.concurrent.ThreadPoolExecutor$Worker.runTask( ...


The error you received most probably relates to the Java version that your instance is running on. We built our add-ons in accordance with the current supported Java platform by Atlassian. More information can be read here: Supported Platforms

  1.  If the version you're running is lesser than what is recommended by Atlassian in the Supported Platforms page, upgrade your Java to the advised version.

    java -version
  2. First, check the Java version your instance is running on: