Data does not fit in the selected QR Code version. Try increasing the version or choosing "Auto".
To automatically generate and download a QR code, pass the following URL parameters:
hello.png
Example:
https://usefulwebtools.com/web-scripts/QR-generator/QR-code-generator.html?filename=simonqrcode.png&text=https://www.simonhuggins.com&size=300&margin=15&correction=H&typeNumber=10