RPCError: ext.flutter.debugDumpFocusTree: (-32603) ext.flutter.debugDumpFocusTree: Unexpected error from chrome devtools:text: Uncaught (in promise)exception:  preview: null  description: null  type: string  value: Unexpected null value.attempted JS eval: `require("dart_sdk").developer.invokeExtension(    "ext.flutter.debugDumpFocusTree", JSON.stringify({}));`#0      handleErrorIfPresent (package:dwds/src/utilities/server.dart:91:5)#1      getResultOrHandleError (package:dwds/src/utilities/server.dart:105:3)#2      AppInspector.jsEvaluate (package:dwds/src/debugging/inspector.dart:346:20)<asynchronous suspension>#3      StackZoneSpecification._registerUnaryCallback.<anonymous closure> (package:stack_trace/src/stack_zone_specification.dart:124:15)<asynchronous suspension>
at new _OutstandingRequest(vm_service.dart:1822)
at VmService._call(vm_service.dart:2366)
at VmService.callServiceExtension(vm_service.dart:2337)
at FlutterVmService._checkedCallServiceExtension(vmservice.dart:885)
at FlutterVmService.invokeFlutterExtensionRpcRaw(vmservice.dart:904)
at FlutterVmService.flutterDebugDumpFocusTree(vmservice.dart:649)
at ResidentHandlers.debugDumpFocusTree(resident_runner.dart:762)
at <asynchronous gap>(async)
at TerminalHandler.processTerminalInput(resident_runner.dart:1821)
at <asynchronous gap>(async)