I encountered a problem after updating a Drupal 8 website recently. When using the search base field, I have this exception :
Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException : The "search_page" entity type did not specify a "search" form class. dans Drupal\Core\Entity\EntityTypeManager->getFormObject() (ligne 184 de /var/www/html/web/core/lib/Drupal/Core/Entity/EntityTypeManager.php).
I have to confess that I don't really understand the problem and where/how to fix it. Does it tell something to someone ?
Thing quite strange : I made other Drupal 8 core updates on other websites, and I didn't have this problem.
Thanks a lot for your help :)