[错误] Typerror panel.postMessage 不是函数

这发生在打开扩展 `ctrl + shift + p` 并选择 `polacode` 时。面板打开，但没有发生任何事情。如果我在开发者控制台中查看，我会看到以下错误： mainThreadExtensionService.ts:66 TypeError: panel.postMessage is not a function at c:\dev\.vscode\extensions\pnp.polacode-0.3.4\src\extension.js:126:15 at l.fire (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:45:801) at t.ExtHostEditors.$acceptEditorPropertiesChanged (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:833:155) at m._doInvokeHandler (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:870:464) at m._invokeHandler (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:870:156) at m._receiveRequest (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:868:817) at m._receiveOneMessage (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:867:623) at c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:865:691 at l.fire (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:45:801) at v.fire (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:256:381) at c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:1059:179 at l.fire (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:45:801) at v.fire (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:256:381) at t.PersistentProtocol._receiveMessage (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:261:451) at c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:258:489 at l.fire (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:45:801) at p.acceptChunk (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:253:851) at c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:253:203 at Socket.t