Can't install via composer for Drupal 9

Hi,

Thanks for the effort. And sorry for my previous attempt to create this in the wrong place. The thing is when I try to install it by composer it gives me an error like below. Do you have any idea?

PS C:\****> composer require 'drupal/mnc:2.x-dev@dev'
./composer.json has been updated
Running composer update drupal/mnc
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - drupal/mnc dev-2.x requires qtip2/qtip2 3.0.3 -> could not be found in any version, there may be a typo in the package name.
    - drupal/mnc 2.x-dev is an alias of drupal/mnc dev-2.x and thus requires it to be installed too.
    - Root composer.json requires drupal/mnc 2.x-dev@dev -> satisfiable by drupal/mnc[2.x-dev (alias of dev-2.x)].

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.
 - It's a private package and you forgot to add a custom repository to find it

Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.