electron:11.0.0,spectron:13.0.0 ran electron test demo, javascript error: javascript error: Cannot convert undefined or null to object

[yoresu]

I am using electron: 11.0.0, spectron: 13.0.0 to run the test demo of electron,
javascript error: javascript error: Cannot convert undefined or null to object
(Session info: chrome=87.0.4280.60)
at Object.getErrorFromResponseBody (node_modules\webdriver\build\utils.js:94:12)
at WebDriverRequest._request (node_modules\webdriver\build\request.js:134:31)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at async Browser.wrapCommandFn (node_modules@wdio\utils\build\shim.js:63:29)
at async Browser.wrapCommandFn (node_modules@wdio\utils\build\shim.js:63:29)

[EnSec4Git]

I'm having the exact same issue (down to the stack trace line / character numbers).
If this is relevant, I started from the Electron Vue scaffolding and updated all of the packages.

At this point, the dev process is rather opaque due to the complicated pipeline - Webpack, TypeScript, Babel, etc.
Can anyone recommend any way to get further visibility into this issue? @yoresu did you use the same scaffolding?

I see #812 shows similar symptoms, but in my case I don't see any output in the Electron windows, just an error message in the console where I start the spectron task.

[movitto]

See #738 for a hotfix / workaround.