volto: Errors in setting up local dev

To setup the development environment, I’ve followed the steps in README.md. The command yarn returns the following errors.

yarn install v0.27.5
[1/4] Resolving packages...
[2/4] Fetching packages...
warning fsevents@1.1.2: The platform "linux" is incompatible with this module.
info "fsevents@1.1.2" is an optional dependency and failed compatibility check. Excluding it from installation.
[3/4] Linking dependencies...
[4/4] Building fresh packages...
[-/5] ⠠ waiting...
[2/5] ⠠ uws
[3/5] ⠠ phantomjs-prebuilt
[4/5] ⠠ node-sass
error /media/ajayns/Projects/Code/xPR/plone-react/node_modules/phantomjs: Command failed.
Exit code: 1
Command: sh
Arguments: -c node install.js
Directory: /media/ajayns/Projects/Code/xPR/plone-react/node_modules/phantomjs
Output:
PhantomJS not found on PATH
Phantom installation failed TypeError: Path must be a string. Received undefined
    at assertPath (path.js:28:11)
    at Object.join (path.js:1251:7)
    at findSuitableTempDirectory (/media/ajayns/Projects/Code/xPR/plone-react/node_modules/phantomjs/install.js:127:30)
    at /media/ajayns/Projects/Code/xPR/plone-react/node_modules/phantomjs/install.js:476:19
    at nextTickCallback (/media/ajayns/Projects/Code/xPR/plone-react/node_modules/kew/kew.js:47:28)
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9) TypeError: Path must be a string. Received undefined
    at assertPath (path.js:28:11)
    at Object.join (path.js:1251:7)
    at findSuitableTempDirectory (/media/ajayns/Projects/Code/xPR/plone-react/node_modules/phantomjs/install.js:127:30)
    at /media/ajayns/Projects/Code/xPR/plone-react/node_modules/phantomjs/install.js:476:19
    at nextTickCallback (/media/ajayns/Projects/Code/xPR/plone-react/node_modules/kew/kew.js:47:28)
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

The backend setup also seems to return a few errors. Running ./bin/buildout

Getting distribution for 'mr.developer==1.34'.
Got mr.developer 1.34.
Getting distribution for 'zc.buildout==2.5.2'.
While:
  Installing.
  Loading extensions.
  Getting distribution for 'zc.buildout==2.5.2'.

An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/buildout.py", line 2123, in main
    getattr(buildout, command)(args)
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/buildout.py", line 637, in install
    self._load_extensions()
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/buildout.py", line 1163, in _load_extensions
    newest=self.newest, allow_hosts=self._allow_hosts)
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/easy_install.py", line 920, in install
    return installer.install(specs, working_set)
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/easy_install.py", line 721, in install
    for dist in self._get_dist(req, ws):
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/easy_install.py", line 577, in _get_dist
    dist = self._env.best_match(requirement, ws)
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 1111, in best_match
    dist = working_set.find(req)
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 715, in find
    raise VersionConflict(dist, req)
VersionConflict: (zc.buildout 2.10.0 (/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg), Requirement.parse('zc.buildout==2.5.2'))

This error also meants the ./bin/instance is never created only.

Still running the dev server with all these errors shows this: (Just added this more info for debug)

Something went wrong: Invalid token specified: Cannot read property 'replace' of undefined

@tisto Please help me out here!