Is there anything wrong with your dev.exs file?

I haven’t touched my dev.exs file, do I need to add anything to it? This is what it looks like:

use Mix.Config
# For development, we disable any cache and enable
# debugging and code reloading.
#
# The watchers configuration can be used to run external
# watchers to your application. For example, we use it
# with webpack to recompile .js and .css sources.
config :hello, HelloWeb.Endpoint,
  http: [port: 4000],
  debug_errors: true,
  code_reloader: true,
  check_origin: false,
  watchers: [
    node: [
      "node_modules/webpack/bin/webpack.js",
      "--mode",
      "development",
      "--watch-stdin",
      cd: Path.expand("../assets", __DIR__)
    ]
  ]

# ## SSL Support
#
# In order to use HTTPS in development, a self-signed
# certificate can be generated by running the following
# Mix task:
#
#     mix phx.gen.cert
#
# Note that this task requires Erlang/OTP 20 or later.
# Run `mix help phx.gen.cert` for more information.
#
# The `http:` config above can be replaced with:
#
#     https: [
#       port: 4001,
#       cipher_suite: :strong,
#       keyfile: "priv/cert/selfsigned_key.pem",
#       certfile: "priv/cert/selfsigned.pem"
#     ],
#
# If desired, both `http:` and `https:` keys can be
# configured to run both http and https servers on
# different ports.

# Watch static and templates for browser reloading.
config :hello, HelloWeb.Endpoint,
  live_reload: [
    patterns: [
      ~r{priv/static/.*(js|css|png|jpeg|jpg|gif|svg)$},
      ~r{priv/gettext/.*(po)$},
      ~r{lib/hello_web/views/.*(ex)$},
      ~r{lib/hello_web/templates/.*(eex)$}
    ]
  ]

# Do not include metadata nor timestamps in development logs
config :logger, :console, format: "[$level] $message\n"

# Set a higher stacktrace during development. Avoid configuring such
# in production as building large stacktraces may be expensive.
config :phoenix, :stacktrace_depth, 20

# Initialize plugs at runtime for faster development compilation
config :phoenix, :plug_init_mode, :runtime

# Configure your database
config :hello, Hello.Repo,
  username: "postgres",
  password: "postgres",
  database: "hello_dev",
  hostname: "localhost",
  pool_size: 10

Sorry if I’m asking anything trivial, this is actually my first time setting up a Phoenix Project by myself.

Maybe it’s trying to find a secret part of a config? Look for something like import_config "dev.secret.exs".

I have the import_config "dev.secret.exs" line in my prod.exs file, but not in my dev.exs file

Which phoenix version do you have?

$ mix phx.new --version

How about recreating your hello project? It should just works fine out of the box.

that can’t be right Try to generate a completely new project in another dir and see if it works

Phoenix version:

$ mix phx.new --version
Phoenix v1.4.0

I’ve tried several times to create the hello project following the Up and Running guide, I actually just tried again and am still getting the same error.

I’m also on a Mac if that’s relevant at all

Where should the import_config "dev.secret.exs" line be located?

I also just tried to create the project in a different directory and I’m getting the same error, import_config "dev.secret.exs" is also still in the same place.

It should be in the dev config, prod might have its own secret. Try to kill your generator and install it again. Something like mix archive.uninstall phx.new and then mix archive.install hex phx_new 1.4.0.

I just generated a project and see that only prod has a secret and it’s prod.secret: import_config "prod.secret.exs", dev should just work out of the box.