vscode F12 says ./logger not found

[yurenchen000]

err msg from vscode console:

Activating extension 'marc-gusmano.extjsdesigner' failed: Cannot find module './logger'

files:
https://github.com/mgusmano/extjsdesigner/blob/master/src/ExtJSEditorProvider.ts#L2
https://github.com/mgusmano/extjsdesigner/blob/master/src/MessagesFromWebviewAndVSCode.ts#L3

https://github.com/mgusmano/extjsdesigner/blob/master/src/InstructionsEditorProvider.ts#L2

import { Logger } from "./logger"; seems should
import { Logger } from './Logger'; ?

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create link by ln -s Logger.js logger.js, seems worked:
logger.js -> Logger.js