My QR code stopped working
If it worked for a week or two and then stopped, it almost certainly wasn't broken. It was switched off.
What happened
Many QR sites make "dynamic" codes: the pattern holds their short link, and their server forwards people to your page. When the free trial ends (often after 7 or 14 days), they stop forwarding until you subscribe, sometimes sending scanners to a page of their own instead.
How to fix it
- Find out which site made it: scan it with your phone and look at the address it opens.
- To revive the printed copies, you'll have to pay that site; the link inside them belongs to them.
- Next time, use a code that doesn't hold you hostage. NeverQR codes never expire, even if you never pay, and you can download a backup that works without us.
- If you only need it to open one page forever, a static code needs no server at all. You can make one here free, too.