Error loading java applet in IE11

Getting following error while editing decision tree on IE11

Error -

Exception in thread "AWT-EventQueue-5" java.lang.ExceptionInInitializerError

at com.blazesoft.template.metaphor.dectable.NdDecTableCellInfo.WjIlMUR(:129)

at com.blazesoft.template.metaphor.dectable.NdDecTableCellInfo.<init>(:116)

at com.blazesoft.devtools.dectree.NdDecTreeHmiClientModel.getRangeTableCellsInfo(:746)

at com.blazesoft.template.metaphor.dectree.NdDecTreeNodeRangeTableModel.getCellsInfo(:187)

at com.blazesoft.devtools.dectable.WjKiprV.getCellsInfo(:382)

at com.blazesoft.devtools.dectable.WjKnfrL.WjKsJKJ(:750)

at com.blazesoft.devtools.dectable.WjKnfrL.<init>(:119)

at com.blazesoft.devtools.dectable.WjKnfrL.<init>(:100)

at com.blazesoft.devtools.dectable.WjIqEHU$WjJBuHO.<init>(:443)

at com.blazesoft.devtools.dectable.WjIqEHU.createDecTableModel(:277)

at com.blazesoft.devtools.dectable.NdMetaphorTableView.setEditorModel(:760)

at com.blazesoft.devtools.dectable.WjIqEHU.WjJBtmW(:197)

at com.blazesoft.devtools.dectable.WjIqOUP.WjJBvgA(:120)

at com.blazesoft.devtools.dectree.NdDecTreeNodePropertiesDialog.WjJAthP(:289)

at com.blazesoft.devtools.dectree.NdDecTreeInstanceEditorView.WjIeReN(:1315)

at com.blazesoft.devtools.dectree.NdDecTreeInstanceEditorView.access$3100(:60)

at com.blazesoft.devtools.dectree.NdDecTreeInstanceEditorView$EditNodePropertiesCommand.executeForNode(:1756)

at com.blazesoft.devtools.dectree.NdDecTreeInstanceEditorView$WjIeRzT.execute(:1962)

at com.blazesoft.devtools.commands.WjHDLsV.actionPerformed(:91)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.AbstractButton.doClick(Unknown Source)

at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)

at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

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

at java.awt.Component.dispatchEventImpl(Unknown Source)

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

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

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

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

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

at java.awt.Window.dispatchEventImpl(Unknown Source)

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

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

at java.awt.EventQueue.access$500(Unknown Source)

at java.awt.EventQueue$3.run(Unknown Source)

at java.awt.EventQueue$3.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)

at java.awt.EventQueue$4.run(Unknown Source)

at java.awt.EventQueue$4.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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)

Caused by: com.blazesoft.util.NdWrappedRuntimeException: Error loading the factory class for regular expression support

Class 'com.blazesoft.patterns.oro.NdORONativeRegularExpressionSupportFactory' could not be found. Please verify it is on the classpath.

at com.blazesoft.patterns.NdRegularExpression.<init>(:83)

at com.blazesoft.patterns.NdRegularExpression.<init>(:59)

at com.blazesoft.template.metaphor.NdRangeTableCellRenderingInfo.<clinit>(:56)