I am having the same issue, as are 11 other people! Why isn't Adobe answering this question??
Are you sure it's not 16 instead of 1g?
Here's a link to the Troubleshooting of Publish Online error message. All of them are numeric only. There is something listed for Error 16:
In error #16, one potential problem is file size. Are there videos in your file? These can run quite large and problems have been reported. However, use of a utility such as Handbrake to downsample the videos has made the files smaller and resolved the problem in other cases.