Issue 3248173 → fixed most of the dispatch() functions but looks like one was missed because we get this error:
The website encountered an unexpected error. Please try again later.TypeError: Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::dispatch(): Argument #1 ($event) must be of type object, string given, called in /var/www/html/docroot/modules/contrib/flag/src/Controller/ActionLinkController.php on line 155 in Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (line 89 of core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php)
Closed: duplicate
Flag core
You are very likely using a custom patch that was not updated.
Thanks for pointing that out. We are using an old patch for the issue 3062604. I updated to the latest patch version and this issue is fixed.
Please close this one.