"Next" button of the Saros Configuration Wizard not working

[m273d15]

Description
The "Next" button of the wizard does not work (no action triggered)

To Reproduce
Steps to reproduce the behavior:

1. Open the Saros Configuration Wizard
2. Enter JID and Password
3. Click "Next"

Expected behavior
The next configuration dialog appears.

Log files

java.lang.NullPointerException at saros.ui.wizards.dialogs.ConfigurationWizardDialog.firePageChanging(ConfigurationWizardDialog.java:55) at org.eclipse.jface.wizard.WizardDialog.doPageChanging(WizardDialog.java:930) at org.eclipse.jface.wizard.WizardDialog.showPage(WizardDialog.java:1214) at org.eclipse.jface.wizard.WizardDialog.nextPressed(WizardDialog.java:917) at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:468) at org.eclipse.jface.dialogs.Dialog.lambda$0(Dialog.java:619) at org.eclipse.swt.events.SelectionListener$1.widgetSelected(SelectionListener.java:84) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4105) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1037) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3922) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3524) at org.eclipse.jface.window.Window.runEventLoop(Window.java:823) at org.eclipse.jface.window.Window.open(Window.java:799) at saros.ui.util.WizardUtils$3.call(WizardUtils.java:115) at saros.ui.util.WizardUtils$3.call(WizardUtils.java:1) at saros.ui.util.SWTUtils$1.run(SWTUtils.java:148) at saros.util.ThreadUtils$1.run(ThreadUtils.java:34) at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:133) at org.eclipse.swt.widgets.Display.syncExec(Display.java:4561) at saros.ui.util.SWTUtils.runSafeSWTSync(SWTUtils.java:172) at saros.ui.util.SWTUtils.runSWTSync(SWTUtils.java:142) at saros.ui.util.WizardUtils.openSarosConfigurationWizard(WizardUtils.java:109) at saros.ui.commandHandlers.StartSarosConfigurationHandler.execute(StartSarosConfigurationHandler.java:12) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:283) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:97) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:318) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:252) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173) at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:487) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213) at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:438) at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:449) at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:475) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4105) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1037) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3922) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3524) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1049) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:658) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:557) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:154) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:150) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1447)

Environment:

• Tested in: IDE Eclipse 2020-03
• Saros Version 16.0.0