Hi Claudia! Sorry you're hitting this -- Could you please submit an issue from within Hype, using Help > Report an Issue? When you do so, please also include your document in the Issue Reporter's Attachments section, and ensure that the "Send logs, preferences, and system information" checkbox is checked.
If you could also let us know a bit about where you're storing your document (if it is not in an internal drive on your -- perhaps a network drive?) that would be very helpful.