EntityStorageException: Missing bundle for entity type node

I tried encrypting an Email field with pre-existing data using Pubkey Encrypt. The batch job "Updating field encryption" is hanging at "Completed 0 of 1".

Looking in the logs, I see two errors for each node:

node: Drupal\Core\Entity\EntityStorageException: Missing bundle for entity type node in Drupal\Core\Entity\ContentEntityStorageBase->doCreate() (line 83 of /path/to/drupal/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php).

field_encrypt: Drupal\Core\Entity\EntityStorageException: Missing bundle for entity type node in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (line 756 of /path/to/drupal/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).

This could be in the wrong queue as there are many modules involved here.