Bug: Error when a field is missing in API results

[HafeezOJ]

Is there an existing issue for this?

• I have searched the existing issues

Description of the bug

An error occurs when an attempt is made to retrieve a field from the API result, but the field is missing, especially the folder_structure field, which is missing in the API result for some items.

Steps To Reproduce

Run ReBACH on article_id 19495022 or 19308497 and observe the error.

[zoidy]

Is this a bug with the figshare API? If so, please submit a bug report with them as well