Switching to perspective graphs and selecting any returns error:

Cannot invoke "org.netxms.client.datacollection.GraphDefinition.isAutoRefresh()" because "this.configuration" is null

journalctl -u tomcat9.service -f output:

Nov 12 08:40:15 sysmon-arpa tomcat9[546]: 08:40:15.196 [UIThread [2dfc4fb5]] DEBUG o.n.nxmc.base.windows.MainWindow - Switching to perspective Graphs
Nov 12 08:40:17 sysmon-arpa tomcat9[546]: 08:40:17.505 [UIThread [2dfc4fb5]] DEBUG o.netxms.nxmc.base.views.ViewStack - Existing view 5bdb3e0c-1856-4024-9f57-95e8403df98d replaced by view 84ff83a4-2c03-491d-bacd-50fbb761e5a2
Nov 12 08:40:17 sysmon-arpa tomcat9[546]: 08:40:17.505 [UIThread [2dfc4fb5]] DEBUG org.netxms.nxmc.base.views.View - View disposed - 5bdb3e0c-1856-4024-9f57-95e8403df98d
Nov 12 08:40:17 sysmon-arpa tomcat9[546]: Exception occurred
Nov 12 08:40:17 sysmon-arpa tomcat9[546]: java.lang.NullPointerException: Cannot invoke "org.netxms.client.datacollection.GraphDefinition.isAutoRefresh()" because "this.configuration" is null
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.modules.datacollection.views.HistoricalGraphView.createActions(HistoricalGraphView.java:536)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.modules.datacollection.views.HistoricalGraphView.createContent(HistoricalGraphView.java:410)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.base.views.View.create(View.java:214)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.base.views.ViewStack.pushViewInternal(ViewStack.java:370)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.base.views.ViewStack.setView(ViewStack.java:323)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.base.views.Perspective.setMainView(Perspective.java:564)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.modules.datacollection.GraphsPerspective.navigationSelectionChanged(GraphsPerspective.java:86)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.base.views.Perspective$1.selectionChanged(Perspective.java:96)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:166)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.util.SafeRunnable$1.run(SafeRunnable.java:130)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:177)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:164)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2193)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1216)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1246)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:232)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.util.OpenStrategy.access$3(OpenStrategy.java:226)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:403)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:109)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:687)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:594)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.Display.executeNextEvent(Display.java:1216)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.Display.runPendingMessages(Display.java:1197)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.Display.safeReadAndDispatch(Display.java:1180)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1172)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.window.Window.runEventLoop(Window.java:869)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.jface.window.Window.open(Window.java:845)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.netxms.nxmc.Startup.createUI(Startup.java:304)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.rap.rwt.internal.lifecycle.RWTLifeCycle.createUI(RWTLifeCycle.java:177)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.rap.rwt.internal.lifecycle.RWTLifeCycle$UIThreadController.run(RWTLifeCycle.java:290)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at java.base/java.lang.Thread.run(Thread.java:833)
Nov 12 08:40:17 sysmon-arpa tomcat9[546]:        at org.eclipse.rap.rwt.internal.lifecycle.UIThread.run(UIThread.java:107)

Legacy webui works,
thanks in advance,
Alessio.