Cannot read property 'Success'

[MaanzAI]

I am getting below error when sending msg to single number and multiple as well.

D:\Office\Projects\Desi\SMS\node_modules\sms-gateway-nodejs\lib\message.js:70
} else if (body.result.success.length) {
^
TypeError: Cannot read property 'success' of undefined
at Request._callback (D:\Office\Projects\Desi\SMS\node_modules\sms-gateway-nodejs\lib\message.js:70:34)