Plugin 1.0.211 won't load project

There's an error in the log:

2014-10-28 10:10:19,498   ERROR -
llij.ide.plugins.PluginManager - IntelliJ IDEA (Cassiopeia) IU-139.144.2
  Build #IU-139.144.2
2014-10-28 10:10:19,498   ERROR -
llij.ide.plugins.PluginManager - JDK: 1.8.0_25
2014-10-28 10:10:19,498   ERROR -
llij.ide.plugins.PluginManager - VM: Java HotSpot(TM) 64-Bit Server VM
2014-10-28 10:10:19,498   ERROR -
llij.ide.plugins.PluginManager - Vendor: Oracle Corporation
2014-10-28 10:10:19,498   ERROR -
llij.ide.plugins.PluginManager - OS: Mac OS X
2014-10-28 10:10:19,498   ERROR -
llij.ide.plugins.PluginManager - Last Action:
2014-10-28 10:10:24,054   ERROR -
llij.ide.plugins.PluginManager - null
java.lang.NullPointerException
     at
scala.collection.mutable.WrappedArray$ofRef.elemTag$lzycompute(WrappedArray.scala:125)
     at
scala.collection.mutable.WrappedArray$ofRef.elemTag(WrappedArray.scala:125)
     at scala.collection.mutable.WrappedArray.newBuilder(WrappedArray.scala:84)
     at
scala.collection.TraversableLike$class.filterImpl(TraversableLike.scala:257)
     at scala.collection.TraversableLike$class.filter(TraversableLike.scala:270)
     at scala.collection.AbstractTraversable.filter(Traversable.scala:104)
     at
org.jetbrains.plugins.scala.project.converter.LibraryReference.directoryBasedLibraryFileIn(LibraryReference.scala:63)
     at
org.jetbrains.plugins.scala.project.converter.LibraryReference.libraryStorageFileIn(LibraryReference.scala:55)
     at
org.jetbrains.plugins.scala.project.converter.ScalaProjectConverter$$anonfun$getAdditionalAffectedFiles$1.apply(ScalaProjectConverter.scala:22)
     at
org.jetbrains.plugins.scala.project.converter.ScalaProjectConverter$$anonfun$getAdditionalAffectedFiles$1.apply(ScalaProjectConverter.scala:22)
     at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:252)
     at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:252)
     at scala.collection.immutable.Set$Set1.foreach(Set.scala:83)
     at
scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:252)
     at scala.collection.AbstractTraversable.flatMap(Traversable.scala:104)
     at
org.jetbrains.plugins.scala.project.converter.ScalaProjectConverter.getAdditionalAffectedFiles(ScalaProjectConverter.scala:22)
     at
org.jetbrains.plugins.scala.project.converter.ScalaProjectConverter.getAdditionalAffectedFiles(ScalaProjectConverter.scala:13)
     at
com.intellij.conversion.impl.ConversionRunner.getAffectedFiles(ConversionRunner.java:130)
     at
com.intellij.conversion.impl.ui.ConvertProjectDialog.(ConvertProjectDialog.java:66)
     at
com.intellij.conversion.impl.ConversionServiceImpl.convert(ConversionServiceImpl.java:132)
     at
com.intellij.openapi.project.impl.ProjectManagerImpl.convertAndLoadProject(ProjectManagerImpl.java:568)
     at
com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:538)
     at com.intellij.ide.impl.ProjectUtil.openProject(ProjectUtil.java:181)
     at
com.intellij.ide.RecentProjectsManager.doOpenProject(RecentProjectsManager.java:44)
     at
com.intellij.ide.ReopenProjectAction.actionPerformed(ReopenProjectAction.java:61)
     at
com.intellij.openapi.wm.impl.welcomeScreen.RecentProjectPanel$1.onClick(RecentProjectPanel.java:77)
     at com.intellij.ui.ClickListener$1.mouseReleased(ClickListener.java:73)
     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:290)
     at java.awt.Component.processMouseEvent(Component.java:6525)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
     at java.awt.Component.processEvent(Component.java:6290)
     at java.awt.Container.processEvent(Container.java:2234)
     at java.awt.Component.dispatchEventImpl(Component.java:4881)
     at java.awt.Container.dispatchEventImpl(Container.java:2292)
     at java.awt.Component.dispatchEvent(Component.java:4703)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
     at java.awt.Container.dispatchEventImpl(Container.java:2278)
     at java.awt.Window.dispatchEventImpl(Window.java:2739)
     at java.awt.Component.dispatchEvent(Component.java:4703)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
     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.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
     at java.awt.EventQueue$4.run(EventQueue.java:719)
     at java.awt.EventQueue$4.run(EventQueue.java:717)
     at java.security.AccessController.doPrivileged(Native Method)
     at
java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)
     at com.intellij.ide.IdeEventQueue.e(IdeEventQueue.java:748)
     at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:573)
     at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:384)
     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)