At config form i get:
InvalidArgumentException: Class "Drupal\timezone_detect\Form\TimezoneDetectSettings" does not exist. in Drupal\Core\DependencyInjection\ClassResolver->getInstanceFromDefinition() (line 24 of core\lib\Drupal\Core\DependencyInjection\ClassResolver.php).
Drupal\layout_builder_st\DependencyInjection\ClassResolver->getInstanceFromDefinition('Drupal\timezone_detect\Form\TimezoneDetectSettings') (Line: 48)
Drupal\Core\Controller\HtmlFormController->getFormObject(Object, 'Drupal\timezone_detect\Form\TimezoneDetectSettings') (Line: 58)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
Closed: works as designed
1.0
Code
Hmm.. and now it works.
I have seen a few times lately where drush cr doesn't rebuild class discovery. I manually emptied all the cache tables (my guess is that the cache_discovery table is the culprit) and then the form loads.