Wallaby " PhantomJS has crashed."

Questions / Help
1

Wallaby crashes for some reason in REPL:

iex(1)> {:ok, a1} = Wallaby.start_session()
{:ok,
 %Wallaby.Session{driver: Wallaby.Phantom,
  id: "68fcba50-493f-11e7-84c3-b11723d35af4", screenshots: [],
  server: #PID<0.203.0>,
  session_url: "http://localhost:41113/session/68fcba50-493f-11e7-84c3-b11723d35af4",
  url: "http://localhost:41113/session/68fcba50-493f-11e7-84c3-b11723d35af4"}}
iex(2)> a2 = Wallaby.Browser.visit(a1, "http://www.example.com") %Wallaby.Session{driver: Wallaby.Phantom,
 id: "68fcba50-493f-11e7-84c3-b11723d35af4", screenshots: [],
 server: #PID<0.203.0>,
 session_url: "http://localhost:41113/session/68fcba50-493f-11e7-84c3-b11723d35af4",
 url: "http://localhost:41113/session/68fcba50-493f-11e7-84c3-b11723d35af4"}

And then, by itself

iex(3)> PhantomJS has crashed. Please read the bug reporting guide at
    <http://phantomjs.org/bug-reporting.html> and file a bug report.

nil

How to cure this?