UndefinedFunctionError phoenix Elixir 新项目

全新安装 Phoenix 后，我尝试触发一个新项目，当我尝试运行服务器时，我遇到了：

Unchecked dependencies for environment dev:
 * gettext (Hex package)
  the dependency is not available, run "mix deps.get"
 * phoenix_live_reload (Hex package)
  the dependency is not available, run "mix deps.get"
 * cowboy (Hex package)
 * List item
...

但当我跑步时mix deps.get I get:

Running dependency resolution
** (UndefinedFunctionError) undefined function Access.Map.get_and_update!/3 (module Access.Map is not available)
    Access.Map.get_and_update!(%Mix.Dep{app: :cowboy, deps: [], extra: [], from: "/Users/victoriawagman/Dropbox/Hemsidor/digitalocean/hello_phoenix/mix.exs", manager: nil, opts: [hex: :cowboy, build: "/Users/victoriawagman/Dropbox/Hemsidor/digitalocean/hello_phoenix/_build/dev/lib/cowboy", dest: "/Users/victoriawagman/Dropbox/Hemsidor/digitalocean/hello_phoenix/deps/cowboy"], requirement: "~> 1.0", scm: Hex.SCM, status: {:unavailable, "/Users/victoriawagman/Dropbox/Hemsidor/digitalocean/hello_phoenix/deps/cowboy"}, top_level: true}, :deps, #Function<13.85268495/1 in Hex.Resolver.attach_dep_and_children/3>)
    (hex) lib/hex/resolver.ex:188: Hex.Resolver.attach_dep_and_children/3
    (hex) lib/hex/resolver.ex:148: Hex.Resolver.get_deps/5
    (hex) lib/hex/resolver.ex:107: Hex.Resolver.activate/6
    (hex) lib/hex/resolver.ex:31: Hex.Resolver.resolve/3
    (hex) lib/hex/remote_converger.ex:31: Hex.RemoteConverger.converge/2
    (mix) lib/mix/dep/converger.ex:92: Mix.Dep.Converger.all/4
    (mix) lib/mix/dep/converger.ex:47: Mix.Dep.Converger.converge/4

我不知道该寻找什么来更深入地挖掘，试图找出我能做些什么来理解问题所在并修复它。请假设我不知道，我正在学习。

另外，我不知道如何单独重新安装十六进制，所以我现在正在寻找它，如果是的话我也有一个十六进制的损坏安装 https://github.com/phoenixframework/phoenix/issues/1307.

我安装的十六进制似乎已损坏。 跑步

mix local.hex

as per Henrik http://thepugautomatic.com/的建议解决了这个问题！ 他有一篇其他人的帖子表明十六进制可能已损坏 http://qiita.com/K_ichi/items/230903d0868669d9deea.

接下来是关于缺少模块早午餐的警告，但通过运行 npm install 解决了这个问题（如触发服务器时建议的输出）。

快乐的时光！