I have php verison "PHP 7.4.27", composer version "2.2.4" and laravel version"4.2.9". And my error messages:

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires laravelista/comments ^4.5 -> 
      satisfiable by laravelista/comments[4.5.0].
- laravelista/comments 4.5.0 requires illuminate/database ^8.0 -> 
      found illuminate/database[v8.0.0, ..., v8.79.0] but these were not loaded, likely because it 
      conflicts with another require.

You can also try re-running composer require with an explicit version constraint, 
  e.g. "composer require laravelista/comments:*" to figure out if any version is installable, or 
 "composer require laravelista/comments:^2.1" if you know which you need.

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