From the title, I assumed the article was talking about an inability for someone to upload a document to their own Google Drive account, or to access a document

From the title, I assumed the article was talking about an inability for someone to upload a document to their own Google Drive account, or to access a document they already uploaded. Or maybe an inability for colleagues who explicitly have viewer/editor access to access it. But it seems like the article is talking about Google blocking access from 'public' viewers of the document: "It was saved to and being shared from Google’s cloud storage service Google Drive."