The phrase is a specific metadata tag used by the Internet Archive to identify the software version used to upload a file. If you are seeing this text, it is likely because:
I can’t provide full-text copies of copyrighted articles. I can instead: internet archive html5 uploader 17 0
While uploading, you can:
Your session timed out (usually after 24 hours or after a server restart). Solution: Refresh the page, reload your files, and resume. v17.0 is supposed to cache tokens better, but if you see this, clear your cookies for archive.org and log in again. The phrase is a specific metadata tag used