it doesn't recognize my qr code

[mnarvaezve]

The reader does not identify why should I use any additional configuration?

The phone only recognizes it but the scanapp.org application does not.

help me

[GinoF]

There may not be enough contrast.
Does this successfully scan with your scanner?

Edit: I tested it myself on scanapp.org - yours isn't detected, but my contrast-adjusted version is detected.