Are you using a QR Code reader?

Try tapping your QR Code reader's share button. Then find a button that says something like "Open in [Your favorite browser here]" and click that. This should solve your problem.

Do you have an old or obsolete browser

If you are using an old browser like Internet Explorer or Safari on an iPad 1 or something like that, switch to a more modern browser such as Safari (later versions), Google Chrome, Microsoft Edge, or Firefox.

Do you not fit in any of these categories?

You should probably try to either switch to a different browser or if that doesn't work find some way to get in touch with me.