java.lang.ClassCastException: class org.antlr.v4.tool.Grammar cannot be cast to class org.antlr.v4.tool.LexerGrammar (org.antlr.v4.tool.Grammar and org.antlr.v4.tool.LexerGrammar are in unnamed module of loader com.intellij.ide.plugins.cl.PluginClassLoader @27e90901)
at org.antlr.intellij.plugin.parsing.ParsingUtils.loadLexerGrammarFor(ParsingUtils.java:384)
at org.antlr.intellij.plugin.parsing.ParsingUtils.loadGrammars(ParsingUtils.java:285)
at org.antlr.intellij.plugin.ANTLRv4PluginController.updateGrammarObjectsFromFile_(ANTLRv4PluginController.java:418)
at org.antlr.intellij.plugin.ANTLRv4PluginController.updateGrammarObjectsFromFile(ANTLRv4PluginController.java:396)
at org.antlr.intellij.plugin.ANTLRv4PluginController.currentEditorFileChangedEvent(ANTLRv4PluginController.java:324)
at org.antlr.intellij.plugin.ANTLRv4PluginController$MyFileEditorManagerAdapter.selectionChanged(ANTLRv4PluginController.java:659)
at com.intellij.util.messages.impl.MessageBusImplKt.invokeMethod(MessageBusImpl.kt:649)
at com.intellij.util.messages.impl.MessageBusImplKt.invokeListener(MessageBusImpl.kt:625)
at com.intellij.util.messages.impl.MessageBusImplKt.deliverMessage(MessageBusImpl.kt:399)
at com.intellij.util.messages.impl.MessageBusImplKt.pumpWaiting(MessageBusImpl.kt:368)
at com.intellij.util.messages.impl.MessageBusImplKt.access$pumpWaiting(MessageBusImpl.kt:1)
at com.intellij.util.messages.impl.MessagePublisher.invoke(MessageBusImpl.kt:431)
at jdk.proxy2/jdk.proxy2.$Proxy122.activeEditorsChanged(Unknown Source)
at com.jetbrains.rdserver.daemon.RdServerEditorTracker.setActiveEditors(RdServerEditorTracker.kt:88)
at com.intellij.codeInsight.daemon.impl.EditorTracker.updateActiveEditors(EditorTracker.java:192)
at com.intellij.codeInsight.daemon.impl.EditorTracker.setActiveWindow(EditorTracker.java:177)
at com.intellij.codeInsight.daemon.impl.EditorTracker$1.selectionChanged(EditorTracker.java:56)
at com.intellij.util.messages.impl.MessageBusImplKt.invokeMethod(MessageBusImpl.kt:649)
at com.intellij.util.messages.impl.MessageBusImplKt.invokeListener(MessageBusImpl.kt:625)
at com.intellij.util.messages.impl.MessageBusImplKt.deliverMessage(MessageBusImpl.kt:399)
at com.intellij.util.messages.impl.MessageBusImplKt.pumpWaiting(MessageBusImpl.kt:378)
at com.intellij.util.messages.impl.MessageBusImplKt.access$pumpWaiting(MessageBusImpl.kt:1)
at com.intellij.util.messages.impl.MessagePublisher.invoke(MessageBusImpl.kt:437)
at jdk.proxy2/jdk.proxy2.$Proxy118.selectionChanged(Unknown Source)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.lambda$fireSelectionChanged$31(FileEditorManagerImpl.java:1614)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl$7.lambda$run$0(FileEditorManagerImpl.java:1155)
at com.intellij.openapi.util.ExpirableRunnable$1.run(ExpirableRunnable.java:17)
at com.intellij.openapi.wm.impl.FocusManagerImpl.lambda$doWhenFocusSettlesDown$3(FocusManagerImpl.java:172)
at com.intellij.util.ui.EdtInvocationManager.invokeLaterIfNeeded(EdtInvocationManager.java:113)
at com.intellij.ide.IdeEventQueue.ifFocusEventsInTheQueue(IdeEventQueue.java:179)
at com.intellij.ide.IdeEventQueue.executeWhenAllFocusEventsLeftTheQueue(IdeEventQueue.java:132)
at com.intellij.openapi.wm.impl.FocusManagerImpl.doWhenFocusSettlesDown(FocusManagerImpl.java:163)
at com.intellij.openapi.wm.impl.FocusManagerImpl.doWhenFocusSettlesDown(FocusManagerImpl.java:169)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl$7.run(FileEditorManagerImpl.java:1154)
at com.intellij.openapi.util.BusyObject$Impl$Simple.execute(BusyObject.java:105)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.notifyPublisher(FileEditorManagerImpl.java:1151)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.fireSelectionChanged(FileEditorManagerImpl.java:1614)
at com.intellij.openapi.fileEditor.impl.EditorsSplitters.lambda$setCurrentWindow$10(EditorsSplitters.java:723)
at com.intellij.openapi.fileEditor.impl.EditorsSplitters.setCurrentWindow(EditorsSplitters.java:732)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl4Edt(FileEditorManagerImpl.java:1011)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.lambda$openFileImpl4$17(FileEditorManagerImpl.java:960)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.runBulkTabChange(FileEditorManagerImpl.java:1697)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.lambda$openFileImpl4$18(FileEditorManagerImpl.java:959)
at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:492)
at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:525)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl4(FileEditorManagerImpl.java:956)
at com.jetbrains.rdserver.fileEditors.BackendServerFileEditorManager.openFileImpl4(BackendServerFileEditorManager.kt:34)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.lambda$openFileImpl2$14(FileEditorManagerImpl.java:884)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:210)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:174)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:164)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:150)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileImpl2(FileEditorManagerImpl.java:883)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileWithProviders(FileEditorManagerImpl.java:764)
at com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.openFileWithProviders(FileEditorManagerImpl.java:724)
at com.intellij.openapi.fileEditor.ex.FileEditorManagerEx.openFile(FileEditorManagerEx.java:127)
at com.intellij.codeInsight.navigation.NavigationUtil.activatePsiElementIfOpen(NavigationUtil.java:217)
at com.intellij.codeInsight.navigation.NavigationUtil.lambda$openFileWithPsiElement$2(NavigationUtil.java:171)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:219)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:174)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:164)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:150)
at com.intellij.codeInsight.navigation.NavigationUtil.openFileWithPsiElement(NavigationUtil.java:170)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.navigate(AbstractPsiBasedNode.java:268)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.navigate(AbstractPsiBasedNode.java:278)
at com.intellij.ide.projectView.impl.nodes.PsiFileNode.navigate(PsiFileNode.java:116)
at com.intellij.util.OpenSourceUtil.navigateToSource(OpenSourceUtil.java:126)
at com.intellij.util.OpenSourceUtil.navigate(OpenSourceUtil.java:81)
at com.intellij.util.OpenSourceUtil.navigate(OpenSourceUtil.java:59)
at com.intellij.util.OpenSourceUtil.navigate(OpenSourceUtil.java:52)
at com.intellij.util.OpenSourceUtil.openSourcesFrom(OpenSourceUtil.java:20)
at com.intellij.util.EditSourceOnDoubleClickHandler$TreeMouseListener.processDoubleClick(EditSourceOnDoubleClickHandler.java:172)
at com.intellij.util.EditSourceOnDoubleClickHandler$TreeMouseListener.onDoubleClick(EditSourceOnDoubleClickHandler.java:166)
at com.intellij.ui.DoubleClickListener.onClick(DoubleClickListener.java:30)
at com.intellij.ui.ClickListener$1.mouseReleased(ClickListener.java:59)
at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:298)
at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
at java.desktop/java.awt.Component.processMouseEvent(Component.java:6648)
at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3392)
at com.intellij.ui.treeStructure.Tree.processMouseEvent(Tree.java:422)
at com.intellij.ide.dnd.aware.DnDAwareTree.processMouseEvent(DnDAwareTree.java:44)
at java.desktop/java.awt.Component.processEvent(Component.java:6413)
at java.desktop/java.awt.Container.processEvent(Container.java:2266)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5022)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4854)
at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4575)
at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2802)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4854)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:781)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:730)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:724)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:754)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:752)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:751)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:898)
at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:820)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:743)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:439)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:791)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:438)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:113)
at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:604)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:436)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:881)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:484)
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)
From the tools using jetbrain ultimate version .