CloudBees Jenkins Operations Center Does Not Start

Issue

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2015-06-24 09:42:01.105+0200 [id=37]    WARNING hudson.ExtensionFinder$Sezpoz#scout: Failed to scout com.cloudbees.opscenter.server.rbac.SharedConfigurationProxyGroupContainer$DescriptorImpl
java.lang.InstantiationException: java.lang.NoClassDefFoundError: com/cloudbees/opscenter/server/config/SharedConfigurationPropertyDescriptor
    at net.java.sezpoz.IndexItem.element(IndexItem.java:146)
    at hudson.ExtensionFinder$Sezpoz.scout(ExtensionFinder.java:666)
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Environment

CloudBees Jenkins Operations Center

Resolution

Ensure that Operations-Center-Server plugin is installed.