Hi
I am getting same error
this is sample code
imageData and strimage both have base64 sring

const settings = {
“async”: true,
“crossDomain”: true,
“url”: “https://face-verification2.p.rapidapi.com/faceverification”,
“method”: “POST”,
“headers”: {
“content-type”: “application/x-www-form-urlencoded”,
“x-rapidapi-host”: “face-verification2.p.rapidapi.com”,
“x-rapidapi-key”: “xyz”
},
“data”: {
“image1Base64”: imageData,
“image2Base64”: strImage
}
};

$.ajax(settings).done(function (response) {alert(1)
console.log(response);
});

Are you sure you call the correct endpoint?
please give us your sample request!