IDEA新创建的插件项目报错，提示找不到Action类:

com.intellij.diagnostic.PluginException: cn.tineaine.nova.NovaUI PluginClassLoader(plugin=PluginDescriptor(name=Nova, id=cn.tineaine.nova, descriptorPath=plugin.xml, path=~/Project/nova/build/idea-sandbox/plugins/nova, version=1.0-SNAPSHOT, package=null, isBundled=false), packagePrefix=null, state=active)
	at com.intellij.serviceContainer.ComponentManagerImpl.instantiateClass(ComponentManagerImpl.kt:1030)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImplKt.instantiate(ActionManagerImpl.kt:1416)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImplKt.convertStub(ActionManagerImpl.kt:1742)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getActionImpl(ActionManagerImpl.kt:311)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getAction(ActionManagerImpl.kt:302)
	at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:357)
	at com.intellij.openapi.actionSystem.impl.ActionGroupStub.initGroup(ActionGroupStub.kt:23)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImplKt.convertGroupStub(ActionManagerImpl.kt:1464)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImplKt.access$convertGroupStub(ActionManagerImpl.kt:1)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getActionImpl(ActionManagerImpl.kt:314)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getAction(ActionManagerImpl.kt:302)
	at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:357)
	at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:334)
	at com.intellij.ide.ui.customization.CustomizationUtil.getReordableChildren(CustomizationUtil.java:136)
	at com.intellij.ide.ui.customization.CustomisedActionGroup.getChildren(CustomisedActionGroup.java:44)
	at com.intellij.openapi.wm.impl.IdeMenuBar.expandActionGroup(IdeMenuBar.kt:526)
	at com.intellij.openapi.wm.impl.IdeMenuBar.doUpdateMenuActions(IdeMenuBar.kt:433)
	at com.intellij.openapi.wm.impl.IdeMenuBar.access$doUpdateMenuActions(IdeMenuBar.kt:61)
	at com.intellij.openapi.wm.impl.IdeMenuBar$scheduleUpdateActions$1$2$1$1.invoke(IdeMenuBar.kt:333)
	at com.intellij.openapi.wm.impl.IdeMenuBar$scheduleUpdateActions$1$2$1$1.invoke(IdeMenuBar.kt:332)
	at com.intellij.openapi.progress.CoroutinesKt.blockingContext(coroutines.kt:248)
	at com.intellij.openapi.progress.CoroutinesKt.blockingContext(coroutines.kt:199)
	at com.intellij.openapi.wm.impl.IdeMenuBar$scheduleUpdateActions$1$2$1.invokeSuspend(IdeMenuBar.kt:332)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at com.intellij.openapi.application.impl.DispatchedRunnable.run(DispatchedRunnable.kt:43)
	at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:208)
	at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:21)
	at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:190)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:861)
	at com.intellij.openapi.application.impl.ApplicationImpl$4.run(ApplicationImpl.java:478)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:79)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:121)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:41)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:792)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:739)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:733)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:761)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:690)
	at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$10(IdeEventQueue.kt:593)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWithoutImplicitRead(ApplicationImpl.java:1485)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:593)
	at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:67)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:369)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:368)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:787)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:368)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:363)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:997)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:105)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:997)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:363)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:861)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:405)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
Caused by: java.lang.ClassNotFoundException: cn.tineaine.nova.NovaUI PluginClassLoader(plugin=PluginDescriptor(name=Nova, id=cn.tineaine.nova, descriptorPath=plugin.xml, path=~/Project/nova/build/idea-sandbox/plugins/nova, version=1.0-SNAPSHOT, package=null, isBundled=false), packagePrefix=null, state=active)
	at com.intellij.serviceContainer.ComponentManagerImplKt.doLoadClass(ComponentManagerImpl.kt:1607)
	at com.intellij.serviceContainer.ComponentManagerImplKt.access$doLoadClass(ComponentManagerImpl.kt:1)
	at com.intellij.serviceContainer.ComponentManagerImpl.instantiateClass(ComponentManagerImpl.kt:1022)
	... 62 more

但是在xml里可以直接点进去，后来发现是kotlin的问题，将项目中的kotlin改成java就行。。。如下图：