java.lang.IncompatibleClassChangeError: This exception has no message.

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java.lang.IncompatibleClassChangeError:
at org.jivesoftware.openfire.gateway.BaseTransport.start(BaseTransport.java:1030)
at org.jivesoftware.openfire.gateway.protocols.irc.IRCTransport.start(IRCTransport.java:134)
at org.jivesoftware.openfire.component.InternalComponentManager.addComponent(InternalComponentManager.java:120)
at org.jivesoftware.openfire.gateway.TransportInstance.startInstance(TransportInstance.java:209)
at org.jivesoftware.openfire.gateway.GatewayPlugin.maybeStartService(GatewayPlugin.java:147)
at org.jivesoftware.openfire.gateway.GatewayPlugin.initializePlugin(GatewayPlugin.java:84)
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java:404)
at org.jivesoftware.openfire.container.PluginManager.access$200(PluginManager.java:46)
at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManager.java:916)

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