What caused NullPointerException: null? I have no idea about it, my laptop just installed android studio, after I import my project, it can't run because of this. Not problems of the project I think because it runs normally in my PC.
null
java.lang.NullPointerException
java.lang.IllegalArgumentException: Argument 0 for @NotNull parameter of com/intellij/util/ui/UIUtil.isFocusAncestor must not be null
at com.intellij.util.ui.UIUtil.isFocusAncestor(UIUtil.java)
at com.intellij.ui.content.impl.ContentManagerImpl.isSelectionHoldsFocus(ContentManagerImpl.java:558)
at com.intellij.ui.content.impl.ContentManagerImpl.setSelectedContent(ContentManagerImpl.java:513)
at com.intellij.ui.content.impl.ContentManagerImpl.setSelectedContentCB(ContentManagerImpl.java:496)
at com.intellij.ui.content.impl.ContentManagerImpl.setSelectedContentCB(ContentManagerImpl.java:485)
at com.intellij.ui.content.impl.ContentManagerImpl.setSelectedContentCB(ContentManagerImpl.java:569)
at com.intellij.ui.content.impl.ContentManagerImpl.setSelectedContent(ContentManagerImpl.java:574)
at com.android.tools.idea.gradle.invoker.GradleTasksExecutor.showMessages(GradleTasksExecutor.java:651)
at com.android.tools.idea.gradle.invoker.GradleTasksExecutor.access$1600(GradleTasksExecutor.java:106)
at com.android.tools.idea.gradle.invoker.GradleTasksExecutor$3$2.run(GradleTasksExecutor.java:326)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:319)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
at java.awt.EventQueue.access$400(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:697)
at java.awt.EventQueue$3.run(EventQueue.java:691)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:697)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:524)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:335)
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)
