Error on startup of example - Unknown option: base.rootMode

[JensHumrich]

Summary

After following the code snippet, how to locally start the example, an error is thrown and the website remains blank.

Expected Behavior

Example website pops up.

Current Behavior

Upon startup an error message is thrown

`$ npm run start

@ start /Users/jh186076/Documents/03_Privat/manifold/examples/manifold
webpack-dev-server --progress --hot --open

10% building 1/1 modules 0 activeℹ ｢wds｣: Project is running at http://localhost:8080/
ℹ ｢wds｣: webpack output is served from /
ℹ ｢wds｣: Content not from webpack is served from /Users/jh186076/Documents/03_Privat/manifold/examples/manifold
40% building 15/16 modules 1 active /Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/events/events.jsℹ ｢wdm｣: wait until bundle finished: /
✖ ｢wdm｣: Hash: d8e9b3efe73932330b3a
Version: webpack 4.41.2
Time: 1141ms
Built at: 01/13/2020 9:47:44 AM
Asset Size Chunks Chunk Names
app.js 377 KiB app [emitted] app
app.js.map 427 KiB app [emitted] [dev] app
index.html 184 bytes [emitted]
Entrypoint app = app.js app.js.map
[0] multi (webpack)-dev-server/client?http://localhost:8080 (webpack)/hot/dev-server.js ./src/main.js 52 bytes {app} [built]
[./node_modules/strip-ansi/index.js] 161 bytes {app} [built]
[./node_modules/webpack-dev-server/client/index.js?http://localhost:8080] (webpack)-dev-server/client?http://localhost:8080 4.29 KiB {app} [built]
[./node_modules/webpack-dev-server/client/overlay.js] (webpack)-dev-server/client/overlay.js 3.51 KiB {app} [built]
[./node_modules/webpack-dev-server/client/socket.js] (webpack)-dev-server/client/socket.js 1.53 KiB {app} [built]
[./node_modules/webpack-dev-server/client/utils/createSocketUrl.js] (webpack)-dev-server/client/utils/createSocketUrl.js 2.89 KiB {app} [built]
[./node_modules/webpack-dev-server/client/utils/log.js] (webpack)-dev-server/client/utils/log.js 964 bytes {app} [built]
[./node_modules/webpack-dev-server/client/utils/reloadApp.js] (webpack)-dev-server/client/utils/reloadApp.js 1.59 KiB {app} [built]
[./node_modules/webpack-dev-server/client/utils/sendMessage.js] (webpack)-dev-server/client/utils/sendMessage.js 402 bytes {app} [built]
[./node_modules/webpack/hot sync ^./log$] (webpack)/hot sync nonrecursive ^./log$ 170 bytes {app} [built]
[./node_modules/webpack/hot/dev-server.js] (webpack)/hot/dev-server.js 1.59 KiB {app} [built]
[./node_modules/webpack/hot/emitter.js] (webpack)/hot/emitter.js 75 bytes {app} [built]
[./node_modules/webpack/hot/log-apply-result.js] (webpack)/hot/log-apply-result.js 1.27 KiB {app} [built]
[./node_modules/webpack/hot/log.js] (webpack)/hot/log.js 1.34 KiB {app} [built]
[./src/main.js] 1.85 KiB {app} [built] [failed] [1 error]
+ 20 hidden modules

WARNING in EnvironmentPlugin - MAPBOX_ACCESS_TOKEN environment variable is undefined.

You can pass an object with default values to suppress this warning.
See https://webpack.js.org/plugins/environment-plugin for example.

ERROR in ./src/main.js
Module build failed (from ./node_modules/babel-loader/lib/index.js):
ReferenceError: [BABEL] /Users/jh186076/Documents/03_Privat/manifold/examples/manifold/src/main.js: Unknown option: base.rootMode. Check out http://babeljs.io/docs/usage/options/ for more information about options.

A common cause of this error is the presence of a configuration options object without the corresponding preset name. Example:

Invalid:
{ presets: [{option: value}] }
Valid:
{ presets: [['presetName', {option: value}]] }

For more detailed information on preset configuration, please see https://babeljs.io/docs/en/plugins#pluginpresets-options.
at Logger.error (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-core/lib/transformation/file/logger.js:41:11)
at OptionManager.mergeOptions (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-core/lib/transformation/file/options/option-manager.js:226:20)
at OptionManager.init (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)
at File.initOptions (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-core/lib/transformation/file/index.js:212:65)
at new File (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-core/lib/transformation/file/index.js:135:24)
at Pipeline.transform (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-core/lib/transformation/pipeline.js:46:16)
at transpile (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-loader/lib/index.js:50:20)
at Object.module.exports (/Users/jh186076/Documents/03_Privat/manifold/examples/manifold/node_modules/babel-loader/lib/index.js:173:20)
Child html-webpack-plugin for "index.html":
1 asset
Entrypoint undefined = index.html
[./node_modules/html-webpack-plugin/lib/loader.js!./node_modules/html-webpack-plugin/default_index.ejs] 376 bytes {0} [built]
[./node_modules/lodash/lodash.js] 528 KiB {0} [built]
[./node_modules/webpack/buildin/global.js] (webpack)/buildin/global.js 472 bytes {0} [built]
[./node_modules/webpack/buildin/module.js] (webpack)/buildin/module.js 497 bytes {0} [built]
ℹ ｢wdm｣: Failed to compile.
`

Context and Environment

npm version 6.13.4
node v12.14.1

Steps to Reproduce

yarn
cd examples/manifold
yarn
npm run start

[kenns29]

@JensHumrich we can't reproduce this error. But I suspect it may have something to do with webpack or babel versions (which is weird given that they are in the package.json). Can you do a yarn list webpack webpack-dev-server webpack-cli and tell us what versions you are using.

[JensHumrich]

@kenns29
(base) jh186076@MUSJH186076-933 manifold (master) $ yarn list webpack webpack-dev-server webpack-cli
yarn list v1.21.1
warning Filtering by arguments is deprecated. Please use the pattern option instead.
├─ webpack-cli@3.3.10
├─ webpack-dev-server@3.9.0
└─ webpack@4.41.2
✨ Done in 1.00s.

[kenns29]

@JensHumrich hmm, can you do yarn list @babel/core.

[JensHumrich]

(base) jh186076@MUSJH186076-933 manifold (master) $ yarn list @babel/core
yarn list v1.21.1
warning Filtering by arguments is deprecated. Please use the pattern option instead.
└─ @babel/core@7.7.4
✨ Done in 0.99s.

[JensHumrich]

I deleted all from the subfolder
/node_modules
/example/manifold/node_modules

and rerun the appropiate ayrn commands. Now it seems to be working @kenns29 Thanks for your support.