My context is special, i inherited a project built by someone else. Sorry for the lack of steps to reproduce.
The fact is that there are fatals that happen on some pages built with Layout Builder, throwing that type of error:

TypeError: Argument 2 passed to Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::dispatch() must be an instance of Symfony\Component\EventDispatcher\Event or null, instance of Drupal\layoutcomponents\Event\LcPreprocessLayoutEvent given, called in modules/contrib/layoutcomponents/layoutcomponents.theme.inc on line 33 in Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (line 89 of core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php)

Issue fork layoutcomponents-3260629

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Artusamak created an issue. See original summary.

Artusamak opened merge request !3

dcraig91’s picture

dcraig91 commented

Thank you, Issue added to #3261822: Layout Components 3.0.2 release plan