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Chat Room Freezing when initiated from Fastpath request

I initiate a Fastpath request from a Java Client I create. When I Do the Spark Chat Room Window seems like it is not being repainted. I checked the errorr.log and this is what I find. Any Help would be appreciated. I am using Spark 2.6.3 Thanks

Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException

at org.jivesoftware.spark.component.tabbedPane.SparkTabbedPane$TabPanel.getPreferr edSize(SparkTabbedPane.java:443)

at com.jtattoo.plaf.BaseTabbedPaneUI.calculateTabHeight(Unknown Source)

at com.jtattoo.plaf.BaseTabbedPaneUI.calculateMaxTabHeight(Unknown Source)

at com.jtattoo.plaf.BaseTabbedPaneUI$TabbedPaneLayout.calculateTabRects(Unknown Source)

at com.jtattoo.plaf.BaseTabbedPaneUI$TabbedPaneLayout.calculateLayoutInfo(Unknown Source)

at com.jtattoo.plaf.BaseTabbedPaneUI$TabbedPaneLayout.layoutContainer(Unknown Source)

at java.awt.Container.layout(Unknown Source)

at java.awt.Container.doLayout(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validateTree(Unknown Source)

at java.awt.Container.validate(Unknown Source)

at org.jivesoftware.fastpath.workspace.Workpane.addRoomInfo(Workpane.java:511)

at org.jivesoftware.fastpath.workspace.Workpane.decorateRoom(Workpane.java:316)

at org.jivesoftware.fastpath.workspace.Workpane$4.chatRoomOpened(Workpane.java:290 )

at org.jivesoftware.spark.ui.ChatContainer.fireChatRoomOpened(ChatContainer.java:8 82)

at org.jivesoftware.spark.ui.ChatContainer.addChatRoom(ChatContainer.java:348)

at org.jivesoftware.spark.ui.conferences.ConferenceUtils.enterRoomOnSameThread(Con ferenceUtils.java:554)

at org.jivesoftware.fastpath.workspace.Workpane$InviteListener.handleInvitation(Wo rkpane.java:657)

at org.jivesoftware.spark.ui.conferences.ConferenceServices$8.run(ConferenceServic es.java:377)

at java.awt.event.InvocationEvent.dispatch(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)