Phoenix 1.6 install error: (UndefinedFunctionError) function :ranch_app.start/2 is undefined

[al2o3cr]

@lc0815

Elixir version
--------------

Elixir 1.13.4 (compiled with Erlang/OTP 22)

Phoenix version
---------------

Phoenix installer v1.6.11
Erlang/OTP 24 [erts-12.3.2.2] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [jit]

First thing that jumps out: this is running on a more recent OTP than the Elixir itself was compiled on (24 vs 22). I don’t recall any specific change that could cause the error you’re seeing, but it’s good practice to keep those versions aligned.

@lc0815

warning: the :gettext compiler is no longer required in your mix.exs.

This warning is caused by the version of Gettext that was released 6 days ago, but should be harmless.

@lc0815

** (Mix) Could not start application ranch: exited in: :ranch_app.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (UndefinedFunctionError) function :ranch_app.start/2 is undefined (module :ranch_app is not available)
            (ranch 1.8.0) :ranch_app.start(:normal, [])
            (kernel 8.3.2) application_master.erl:293: :application_master.start_it_old/4

The (ranch 1.8.0) label on the stack trace suggests that ranch is at least partly installed, but the failure means it isn’t completely installed. Do you get any error messages when running mix deps.compile --force?