Hi all,

I have a problem with setting up simple phoenix app with mix phx.new. Weirdest thing is - it worked last week without a problem and now I don’t know what I changed (I am almost sure it was nothing) and why it’s not working.

Problem: when creating new project with mix phx.new, after I cd into new directory and run mix ecto.create I get:

10:39:36.405 [error] GenServer #PID<0.292.0> terminating
** (UndefinedFunctionError) function :crypto.hmac/3 is undefined or private
    (crypto 5.0.2) :crypto.hmac(:sha256, "postgres", <<236, 186, 74, 106, 223, 211, 23, 71, 163, 135, 42, 171, 252, 96, 232, 70, 0, 0, 0, 1>>)
    (postgrex 0.15.0) lib/postgrex/scram.ex:52: Postgrex.SCRAM.hash_password/6
    (postgrex 0.15.0) lib/postgrex/scram.ex:26: Postgrex.SCRAM.verify/2
    (postgrex 0.15.0) lib/postgrex/protocol.ex:734: Postgrex.Protocol.auth_cont/4
    (postgrex 0.15.0) lib/postgrex/protocol.ex:579: Postgrex.Protocol.handshake/2
    (db_connection 2.4.0) lib/db_connection/connection.ex:82: DBConnection.Connection.connect/2
    (connection 1.1.0) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib 3.15.2) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol

As stated - this was working already before. I tried to uninstall everything phoenix/elixir related and redeploy. I am pretty sure the versions did not change.
I googled that error and it seems it was related to the deprecation of that function in OTP24, but that was some time ago (not over the weekend). In my mix.exs I see following entries:

      {:plug, "~> 1.12"},
      {:plug_crypto, "~> 1.1.2 or ~> 1.2"},

It would mean I have the latest dependencies there.
I am rather new to phoenix so I would need some guidance on where to look next.