Told I don't have permission to delete file even though I have Delete Item permission

Requires Views, Views Bulk Operations

Steps:

1. Give administrator permission for Actions permissions (VBO) Execute Delete item
2. Create view containing list of files
3. In the bulk operations folder, check one or more files
4. In the Operations dropdown, choose operation Delete item
5. Click execute button
6. Click confirmation button

Expected result: file is deleted
Actual result: file is not deleted. Drupal Watchdog log shows the following (brackets indicate redactions):

https://[domain]|[sequence #]|views bulk operations|[IP address]|https://[domain]/batch?id=[id]&op=do|https://[domain]/batch?op=start&id=[id]|193||Skipped Delete item on file [file name] due to insufficient permissions. request_id="[request ID]"