Drupal error due to DrushLog

Symptoms

You may have error messages like:

The website encountered an unexpected error. Please try again later.
and
Error: Class 'Drush\Log\DrushLog' not found in Drupal\Component\DependencyInjection\Container->createService() (line 257 of /home/drupal/public_html/www/web/core/lib/Drupal/Component/DependencyInjection/Container.php)

probably this is due to DrushLog class.

Solution.

Include the package drush/drush
composer require drush/drush