java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at java.awt.Container.add(Container.java:417)
at com.intellij.ui.tabs.impl.JBTabsImpl.addTab(JBTabsImpl.java:765)
at com.intellij.ui.JBTabsPaneImpl.insertTab(JBTabsPaneImpl.java:107)
at com.intellij.ui.TabbedPaneWrapper.insertTab(TabbedPaneWrapper.java:133)
at com.intellij.ui.TabbedPaneWrapper.addTab(TabbedPaneWrapper.java:129)
at com.intellij.ui.HeaderlessTabbedPane.addTab(HeaderlessTabbedPane.java:31)
at com.intellij.diagnostic.IdeErrorsDialog.c(IdeErrorsDialog.java:653)
at com.intellij.diagnostic.IdeErrorsDialog.g(IdeErrorsDialog.java:418)
at com.intellij.diagnostic.IdeErrorsDialog.updateOnSubmit(IdeErrorsDialog.java:933)
at com.intellij.diagnostic.IdeMessagePanel$3.updateOnSubmit(IdeMessagePanel.java:142)
at com.intellij.diagnostic.IdeErrorsDialog$BlameAction.a(IdeErrorsDialog.java:901)
at com.intellij.openapi.application.TransactionGuardImpl$6.run(TransactionGuardImpl.java:291)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:338)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.h(IdeEventQueue.java:863)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:699)
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)

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