Failure in Diarium

diarium-fail.erl

3:00:49.409 [error] GenServer #PID<0.266.0> terminating
** (stop) exited in: GenServer.call(#PID<0.265.0>, {:checkout, :run}, 5000)
    ** (EXIT) an exception was raised:
        ** (UndefinedFunctionError) undefined function: Connection.start_link/2 (module Connection is not available)
            Connection.start_link(Postgrex.Connection, [hostname: "localhost", timeout: 5000, otp_app: :diarium, repo: Diarium.Repo, adapter: Ecto.Adapters.Postgres, username: "postgres", password: "postgres", database: "diarium_prod", extensions: [{Ecto.Adapters.Postgres.DateTime, []}, {Postgrex.Extensions.JSON, [library: Poison]}], port: 5432])
            (ecto) lib/ecto/adapters/connection.ex:27: Ecto.Adapters.Connection.connect/2
            (ecto) lib/ecto/pools/poolboy/worker.ex:58: Ecto.Pools.Poolboy.Worker.handle_call/3
            (stdlib) gen_server.erl:629: :gen_server.try_handle_call/4
            (stdlib) gen_server.erl:661: :gen_server.handle_msg/5
            (stdlib) proc_lib.erl:240: :proc_lib.init_p_do_apply/3
    (elixir) lib/gen_server.ex:544: GenServer.call/3
    (ecto) lib/ecto/pools/poolboy.ex:104: Ecto.Pools.Poolboy.do_checkout/4
    (stdlib) timer.erl:166: :timer.tc/1
    (ecto) lib/ecto/pools/poolboy.ex:82: Ecto.Pools.Poolboy.checkout/3
    (ecto) lib/ecto/pool.ex:169: Ecto.Pool.checkout/3
    (ecto) lib/ecto/pool.ex:156: Ecto.Pool.do_run/4
    (ecto) lib/ecto/adapters/sql.ex:247: Ecto.Adapters.SQL.query/6
    (ecto) lib/ecto/adapters/sql.ex:225: Ecto.Adapters.SQL.query/5

=CRASH REPORT==== 28-Dec-2015::13:00:49 ===
  crasher:
    initial call: Elixir.Diarium.EntryRequester:init/1
    pid: <0.266.0>
    registered_name: []
    exception exit: {{undef,
                      [{'Elixir.Connection',start_link,
                        ['Elixir.Postgrex.Connection',
                         [{hostname,<<"localhost">>},
                          {timeout,5000},
                          {otp_app,diarium},
                          {repo,'Elixir.Diarium.Repo'},
                          {adapter,'Elixir.Ecto.Adapters.Postgres'},
                          {username,<<"postgres">>},
                          {password,<<"postgres">>},
                          {database,<<"diarium_prod">>},
                          {extensions,
                           [{'Elixir.Ecto.Adapters.Postgres.DateTime',[]},
                            {'Elixir.Postgrex.Extensions.JSON',
                             [{library,'Elixir.Poison'}]}]},
                          {port,5432}]],
                        []},
                       {'Elixir.Ecto.Adapters.Connection',connect,2,
                        [{file,"lib/ecto/adapters/connection.ex"},{line,27}]},
                       {'Elixir.Ecto.Pools.Poolboy.Worker',handle_call,3,
                        [{file,"lib/ecto/pools/poolboy/worker.ex"},{line,58}]},
                       {gen_server,try_handle_call,4,
                        [{file,"gen_server.erl"},{line,629}]},
                       {gen_server,handle_msg,5,
                        [{file,"gen_server.erl"},{line,661}]},
                       {proc_lib,init_p_do_apply,3,
                        [{file,"proc_lib.erl"},{line,240}]}]},
                     {'Elixir.GenServer',call,
                      [<0.265.0>,{checkout,run},5000]}}
      in function  gen_server:terminate/7 (gen_server.erl, line 826)
    ancestors: ['Elixir.Diarium.Supervisor',<0.98.0>]
    messages: []
    links: [<0.99.0>]
    dictionary: []
    trap_exit: false
    status: running
    heap_size: 1598
    stack_size: 27
    reductions: 363
  neighbours:

=SUPERVISOR REPORT==== 28-Dec-2015::13:00:49 ===
     Supervisor: {local,'Elixir.Diarium.Supervisor'}
     Context:    child_terminated
     Reason:     {{undef,
                      [{'Elixir.Connection',start_link,
                           ['Elixir.Postgrex.Connection',
                            [{hostname,<<"localhost">>},
                             {timeout,5000},
                             {otp_app,diarium},
                             {repo,'Elixir.Diarium.Repo'},
                             {adapter,'Elixir.Ecto.Adapters.Postgres'},
                             {username,<<"postgres">>},
                             {password,<<"postgres">>},
                             {database,<<"diarium_prod">>},
                             {extensions,
                                 [{'Elixir.Ecto.Adapters.Postgres.DateTime',
                                      []},
                                  {'Elixir.Postgrex.Extensions.JSON',
                                      [{library,'Elixir.Poison'}]}]},
                             {port,5432}]],
                           []},
                       {'Elixir.Ecto.Adapters.Connection',connect,2,
                           [{file,"lib/ecto/adapters/connection.ex"},
                            {line,27}]},
                       {'Elixir.Ecto.Pools.Poolboy.Worker',handle_call,3,
                           [{file,"lib/ecto/pools/poolboy/worker.ex"},
                            {line,58}]},
                       {gen_server,try_handle_call,4,
                           [{file,"gen_server.erl"},{line,629}]},
                       {gen_server,handle_msg,5,
                           [{file,"gen_server.erl"},{line,661}]},
                       {proc_lib,init_p_do_apply,3,
                           [{file,"proc_lib.erl"},{line,240}]}]},
                  {'Elixir.GenServer',call,[<0.265.0>,{checkout,run},5000]}}
     Offender:   [{pid,<0.266.0>},
                  {id,'Elixir.Diarium.EntryRequester'},
                  {mfargs,{'Elixir.Diarium.EntryRequester',start_link,[]}},
                  {restart_type,permanent},
                  {shutdown,5000},
                  {child_type,worker}]

Did you find a solution to this? I'm hitting the same problem.