Using this skeleton with Phalcon 4

[amsharma9]

Hi,

I am unable to get this skeleton to work with Phalcon 4.1.0 on my 64bit Windows 10 machine using Wampserver. It shows me errors in most initialization files as given below:

• In config\services.php it says Undefined Phalcon\Di\FactoryDefault()
  $di = new FactoryDefault();

• In config\acl.php it says Undefined Phalcon\Acl
  $acl->setDefaultAction(Phalcon\Acl::DENY);

• In public\index.php
  $app = new Micro($di);

Do I have to run composer to complete the installation? Do I need to update the composer.json file for newer versions of Phalcon. I assume I will to update it. What do I specify in the dependencies?
composer update gives below errors on command prompt:

  Problem 1
    - phalcon/devtools[v3.2.0, ..., v3.2.13] require ext-phalcon ~3.1 -> it has the wrong version installed (4.1.0).
    - phalcon/devtools[v3.4.0, ..., v3.4.14] require ext-phalcon ~3.3 -> it has the wrong version installed (4.1.0).
    - Root composer.json requires phalcon/devtools ^3.2 -> satisfiable by phalcon/devtools[v3.2.0, ..., v3.4.14].

Phalcon 4.1.0. is installed and shown by phpinfo(). I am using Php 7.4.26 and Apache 2.4.51.
TIA.

Regards
Amal