[Error] Typerror panel.postMessage is not a function

This occurs when opening the extension ctrl + shift + p select polacode. The panel opens up but nothing happens. If I look in the developer console I see the following error :

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 (c:\dev\AppData\Local\Programs\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:263:54)
    at Socket.emit (events.js:223:5)
    at addChunk (_stream_readable.js:309:12)
    at readableAddChunk (_stream_readable.js:290:11)
    at Socket.Readable.push (_stream_readable.js:224:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:181:23)
$onExtensionRuntimeError @ mainThreadExtensionService.ts:66
_doInvokeHandler @ rpcProtocol.ts:401
_invokeHandler @ rpcProtocol.ts:332
_receiveRequest @ rpcProtocol.ts:278
_receiveOneMessage @ rpcProtocol.ts:220
(anonymous) @ rpcProtocol.ts:93
fire @ event.ts:535
fire @ ipc.net.ts:407
_receiveMessage @ ipc.net.ts:755
(anonymous) @ ipc.net.ts:630
fire @ event.ts:535
acceptChunk @ ipc.net.ts:224
(anonymous) @ ipc.net.ts:149
t @ ipc.net.ts:892
emit @ events.js:223
addChunk @ _stream_readable.js:309
readableAddChunk @ _stream_readable.js:290
Readable.push @ _stream_readable.js:224
onStreamRead @ internal/stream_base_commons.js:181
mainThreadExtensionService.ts:65 [[object Object]]panel.postMessage is not a function
$onExtensionRuntimeError @ terminalInstanceService.ts:31
_doInvokeHandler @ rpcProtocol.ts:401
_invokeHandler @ rpcProtocol.ts:332
_receiveRequest @ rpcProtocol.ts:278
_receiveOneMessage @ rpcProtocol.ts:220
(anonymous) @ rpcProtocol.ts:93
fire @ event.ts:535
fire @ ipc.net.ts:407
_receiveMessage @ ipc.net.ts:755
(anonymous) @ ipc.net.ts:630
fire @ event.ts:535
acceptChunk @ ipc.net.ts:224
(anonymous) @ ipc.net.ts:149
t @ ipc.net.ts:892
emit @ events.js:223
addChunk @ _stream_readable.js:309
readableAddChunk @ _stream_readable.js:290
Readable.push @ _stream_readable.js:224
onStreamRead @ internal/stream_base_commons.js:181

About

Version: 1.50.0 (user setup)
Commit: 93c2f0fbf16c5a4b10e4d5f89737d9c2c25488a3
Date: 2020-10-07T06:10:52.432Z
Electron: 9.2.1
Chrome: 83.0.4103.122
Node.js: 12.14.1
V8: 8.3.110.13-electron.0
OS: Windows_NT x64 10.0.19041

octref / polacode

[Error] Typerror panel.postMessage is not a function #146