Getting error when generating QR code

API: https://masterpasstest.oltio.co.za/pluto/code/create

Request: {
"amount": 0,
"expiryDate": 0,
"merchantReference": 21022,
"requestPartialPayment": false,
"requestTip": false,
"shortDescription": "",
"useOnce": false,
"emailNotify": [
"rohan.pande@gmail.com"
]
}

Response: Validation error: Invalid Email - rohan.pande@gmail.com

Same request was working till 17 March but started giving issue from yesterday evening. CAn you please check and advise