Field field_availability_daily is unknown.

Problem/Motivation

This error occurs when loading the availability page in the context of an hourly reservation.

InvalidArgumentException: Field field_availability_daily is unknown. in Drupal\Core\Entity\ContentEntityBase->getTranslatedField() (line 616 of core/lib/Drupal/Core/Entity/ContentEntityBase.php). 

Proposed resolution

Modify buildForm in UpdateAvailabilityForm to handle daily or hourly modes based on the node settings.