Amex Card Scanning Doesn't work!!!

[xubi15]

I tried scanning with Mastercard (16 digits 4+4+4+4) and Visa (16 digit) which works pretty well. But American Express (15 digits 4+6+5) is not working.

[TheHibbs]

I am also running into this issue.

[hector-glinch]

Mi tarjeta