A 501 error is returned when using a previous_interaction_id associated with a file storage query

I’m using the Interactions API, and yesterday I started getting a 501 - Operation is not implemented, supported, or enabled error.

The issue only occurs when I provide a previous_interaction_id that references a previous interaction involving a file storage query. When the previous_interaction_id does not reference a file storage query, the request works as expected.

I found a GitHub issue that appears to describe a similar problem. However, I’m using the REST API directly rather than one of the SDKs, so I’m not sure whether the issue is related.

In my case, the error only occurs when the previous_interaction_id references an interaction involving a file storage query.