Candidate cannot upload miscellaneous document

Summary:

Update: Issue resolved.

For some reason, external candidates get the below error when attempting to upload miscellaneous documents as part of the Request Additional Information flow.

This was previously working and no configuration updates/modifications to manage attachment category/file area.

Content (required):

Version (include the version you are using, if applicable):

23A

Code Snippet (add any code snippets that support your topic, if applicable):