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

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at org.jivesoftware.openfire.gateway.BaseTransport.start(
at org.jivesoftware.openfire.gateway.protocols.irc.IRCTransport.start(
at org.jivesoftware.openfire.component.InternalComponentManager.addComponent(
at org.jivesoftware.openfire.gateway.TransportInstance.startInstance(
at org.jivesoftware.openfire.gateway.GatewayPlugin.maybeStartService(
at org.jivesoftware.openfire.gateway.GatewayPlugin.initializePlugin(
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(
at org.jivesoftware.openfire.container.PluginManager.access$200(
at org.jivesoftware.openfire.container.PluginManager$

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