InvalidArgumentException: Class "\Drupal\ckeditor_ai_agent\Form\AiAgentSettingsForm" does not exist. in Drupal\Core\DependencyInjection\ClassResolver->getInstanceFromDefinition() (line 32 of C:\wamp64\www\dummydr\web\core\lib\Drupal\Core\DependencyInjecti

Working on it.

I have tried the things below

1. Debugging Class Loading & Autoload Issues

• Verified Composer autoloading: lando composer dump-autoload -o
• Checked CKEditor AI Agent’s namespace in composer.json
• Findings: No immediate resolution; issue persisted when OpenAI was enabled.

2. Checking Dependency Conflicts

• Checked module dependencies:
  lando drush pm:list --status=enabled | grep openai
• Investigated if OpenAI modifies dependency injection.
• Findings:

  OpenAI requires guzzlehttp/guzzle, which could affect service resolution.

  No direct conflicts found, but OpenAI modifies service injection.

3. Testing OpenAI Event Subscriber & Dependency Injection Conflicts

• Disabled OpenAI’s Event Subscriber in openai.services.yml.
• Rebuilt cache and tested again (still Issue persisted).
• Debugged class resolution:
  $resolver = \Drupal::service('class_resolver'); dpm($resolver->getInstanceFromDefinition('Drupal\ckeditor_ai_agent\Form\AiAgentSettingsForm'));