Fehlermeldung
Warning: array_flip(): Can only flip string and integer values, entry skipped in Drupal\Core\Entity\EntityStorageBase->loadMultiple() (line 278 of core/lib/Drupal/Core/Entity/EntityStorageBase.php).Warning: Attempt to read property "name" on null in template_preprocess_schauburg_reservation_form() (line 86 of modules/custom/schauburg_reservierung/schauburg_reservierung.module).
Warning: Attempt to read property "value" on null in template_preprocess_schauburg_reservation_form() (line 86 of modules/custom/schauburg_reservierung/schauburg_reservierung.module).