UninitializedHolderException when selecting course

[ullebe1]

When selecting a course in the TMC plugin the window closed and I got the following error in the console. After pressing "Get started with TMC" again the course was successfully selected when the window opened, and I could continue to download the exercises.

fi.helsinki.cs.tmc.core.exceptions.UninitializedHolderException: Attempted to get item from a holder that was not properly initialized at fi.helsinki.cs.tmc.core.holders.TmcSettingsHolder.get(TmcSettingsHolder.java:25) at fi.helsinki.cs.tmc.core.utilities.TmcServerAddressNormalizer.<init>(TmcServerAddressNormalizer.java:22) at fi.helsinki.cs.tmc.intellij.ui.login.LoginDialog.getAddressNormalizer(LoginDialog.java:90) at fi.helsinki.cs.tmc.intellij.ui.login.LoginDialog.lambda$createActionListenerChangeServerAddress$0(LoginDialog.java:151) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6548) at javax.swing.JComponent.processMouseEvent(JComponent.java:3325) at java.awt.Component.processEvent(Component.java:6313) at java.awt.Container.processEvent(Container.java:2237) at java.awt.Component.dispatchEventImpl(Component.java:4903) at java.awt.Container.dispatchEventImpl(Container.java:2295) at java.awt.Component.dispatchEvent(Component.java:4725) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467) at java.awt.Container.dispatchEventImpl(Container.java:2281) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4725) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764) at java.awt.EventQueue.access$500(EventQueue.java:98) at java.awt.EventQueue$3.run(EventQueue.java:715) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:737) at java.awt.EventQueue$4.run(EventQueue.java:735) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:734) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:781) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:718) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109) at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190) at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235) at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233) at java.security.AccessController.doPrivileged(Native Method) at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233) at java.awt.Dialog.show(Dialog.java:1077) at java.awt.Component.show(Component.java:1685) at java.awt.Component.setVisible(Component.java:1637) at java.awt.Window.setVisible(Window.java:1014) at java.awt.Dialog.setVisible(Dialog.java:998) at fi.helsinki.cs.tmc.intellij.ui.login.LoginDialog.display(LoginDialog.java:100) at fi.helsinki.cs.tmc.intellij.actions.buttonactions.TmcSettingsAction.showSettings(TmcSettingsAction.java:37) at fi.helsinki.cs.tmc.intellij.actions.buttonactions.TmcSettingsAction.actionPerformed(TmcSettingsAction.java:25) at com.intellij.openapi.actionSystem.ex.ActionUtil.invokeAction(ActionUtil.java:347) at com.intellij.openapi.actionSystem.ex.ActionUtil.invokeAction(ActionUtil.java:334) at com.intellij.ui.components.labels.ActionLink$1.linkSelected(ActionLink.java:60) at com.intellij.ui.components.labels.LinkLabel.doClick(LinkLabel.java:142) at com.intellij.ui.components.labels.ActionLink.doClick(ActionLink.java:69) at com.intellij.ui.components.labels.LinkLabel$MyMouseHandler.mouseReleased(LinkLabel.java:326) at java.awt.Component.processMouseEvent(Component.java:6548) at javax.swing.JComponent.processMouseEvent(JComponent.java:3325) at java.awt.Component.processEvent(Component.java:6313) at java.awt.Container.processEvent(Container.java:2237) at java.awt.Component.dispatchEventImpl(Component.java:4903) at java.awt.Container.dispatchEventImpl(Container.java:2295) at java.awt.Component.dispatchEvent(Component.java:4725) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467) at java.awt.Container.dispatchEventImpl(Container.java:2281) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4725) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764) at java.awt.EventQueue.access$500(EventQueue.java:98) at java.awt.EventQueue$3.run(EventQueue.java:715) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90) at java.awt.EventQueue$4.run(EventQueue.java:737) at java.awt.EventQueue$4.run(EventQueue.java:735) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80) at java.awt.EventQueue.dispatchEvent(EventQueue.java:734) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:781) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:718) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

System information:
OS: Arch Linux
Architecture: x86_64
Kernel: 4.18.6
Locale: en_DK.UTF-8
IntelliJ version: IntelliJ Ultimate 2018.2.3
Java environment: The one bundled with IntelliJ Ultimate 2018.2.3
TMC plugin version: 2.0.2