I receive the error

Error during WebSocket handshake: Unexpected response code: 500

in my browser.

The Phoenix code is

defmodule SyntaxWeb.UserSocket do
  use Phoenix.Socket

  def connect(%{"token" => token}, socket, _connect_info) do
    IO.inspect "get here"
    case Phoenix.Token.verify(socket, "user socket", token, max_age: 1209600) do
      {:ok, user_id} ->
        IO.inspect "and get there"
        {:ok, assign(socket, :current_user, Syntax.Accounts.get_user!(user_id))}
      {:error, reason} ->
        IO.inspect "bad user socket token : #{reason}"
        :error
    end
  end
end

The javascript code uses is :

let { Socket } = require('phoenix-channels');
socket = new Socket("ws:" + myurl + "/socket", {params: {token: userToken}})
socket.connect();

The request for connection reaches the server as I have both “get here” and “get there” displayed. Would anyone have an idea of what goes wrong ?