I'm trying to upload files via the API (issuu.document.upload). It worked in the past. But on new files I receive always the following response error:
{"rsp":{"_content":{"error":{"code":"999","message":"a66125aeaff42e3a893a985fdc9b659587880484 - Internal server error"}},"stat":"fail"}}
The document also does not show up in "My Publications" (http://issuu.com/home/publications)
There is no API documentation about this error code...