Why do I have a note like "There was an error uploading a file attachment for this incident." in my incident?

Environment:

All versions, File Attachment Server (FAS)

Resolution:

When you get an error such as,

There was an error uploading a file attachment for this incident,

submit a service request via Ask Technical Support to get more information on these errors.

Example errors in multiple languages:

Se ha producido un error al cargar un archivo adjunto para este incidente.

Si è verificato un errore durante il caricamento dell'allegato file per questo caso.

Beim Hochladen des Dateianhangs für diesen Vorgang ist ein Fehler aufgetreten.

Er is een fout opgetreden bij het uploaden van een bestandsbijlage voor dit incident.

Cause:

Our system creates a note in a thread when an error occurs saving a file attachment during incident create.