Class "Pharborist\Parser" not found in Drupal\drupalmoduleupgrader\Plugin\DMU\Indexer\Classes->addFile()

Did you install the project with composer?

yes i install the module though composer require

Ok, hm, it sounds like some problem with autoloading to me honestly. However composer requiring it should have regenerated the autoload and should have gotten the dependency.

so whats the next step ?