I am trying to create a template with header media using the Cloud API but my service has been blocked with this message:

Access to XMLHttpRequest at 'https://graph.facebook.com/v19.0/upload:MTphdHRhY2htZW50OjBmMDBmOTNjLWViYTAtNGU2ZC1iNWZmLTM3ZjQwNjIwZjE3YT9maWxlX2xlbmd0aD0xMzg5OTM0MiZmaWxlX3R5cGU9dmlkZW8lMkZtcDQ=?sig=ARZXOtvrVyKDKB_COuc' from origin 'https://im.atimosoftware.com.br' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

By the guides I need send the file to a session previously created, till here every fine, I made made the request and the ID is returned.

When I try to send the file, my request is Blocked by CORS policy.

Here the code used to request upload file:

Requesting Session ID

POST https://graph.facebook.com/{api-version}/{app-id}/uploads &file_length={file-length} &file_type={file-type} &access_token={access-token}

$.ajax({
    method: 'POST',
    url: `https://graph.facebook.com/v19.0/{app.id}/uploads?file_length=${file.size}&file_type=${file.type}&access_token=${GraphApi.userAccessToken}`
})
.done(function (result) {
    if( result.id ){
        sendFileToWabaSession(byteArray, result.id)
    }
});

Send File

POST https://graph.facebook.com/{api-version}/{upload-session-id} --header 'Authorization: OAuth {access-token}' --header 'file_offset: 0' --data-binary @{file-name}

function sendFileToWabaSession( sessionId ){
$.ajax({
    url: 'https://graph.facebook.com/v19.0/' + sessionId,
    crossDomain: true,
    method: 'post',
    headers: {
        'Authorization': 'OAuth ' + GraphApi.userAccessToken,
        'file_offset': '0'
    },
    data: byteArray
})
.done(function (result) {

    if( result.h )
        metaHeaderSessionId = result.h;
    else{
        console.error(result);
}

})
.fail(function () {
    console.error(arguments);
});
}

Obs.: byteArray sended is the file selected by user

That is the only endpoint I pass through this error.

Can anyone please help me in this issue?