If the gate does not open with QR-code on your smartphone, turn off the NFC on your smartphone and try again, don't keep your smartphone to close to the scanner. (NFC can be found in the "settings" of your smartphone under "connections").
If the gate does not open with QR-code on your smartphone, turn off the NFC on your smartphone and try again, don't keep your smartphone to close to the scanner. (NFC can be found in the "settings" of your smartphone under "connections").