Hello, I am having QR code problems which are hyperlink to pdf assets in box. 

Initial stage, the QR codes worked fine. After a few months, upon scanning the same QR code, box displayed error message: The requested page does not exist.

Note: There are 264 individual pdf assets (in box), they were not moved; file names were not changed. I am using Mac. QR codes were generated via a freeware called "QR Code Generator"

TIA