Get access token method throwing exception

[satheeshwaran]

I am getting the below exception

TypeError: Cannot read property 'name' of null
    at FormData._getContentDisposition (/user_code/node_modules/fb/node_modules/form-data/lib/form_data.js:226:39)
    at FormData._multiPartHeader (/user_code/node_modules/fb/node_modules/form-data/lib/form_data.js:177:33)
    at FormData.append (/user_code/node_modules/fb/node_modules/form-data/lib/form_data.js:70:21)
    at appendFormValue (/user_code/node_modules/fb/node_modules/request/request.js:323:21)
    at Request.init (/user_code/node_modules/fb/node_modules/request/request.js:334:11)
    at new Request (/user_code/node_modules/fb/node_modules/request/request.js:128:8)
    at request (/user_code/node_modules/fb/node_modules/request/index.js:53:10)
    at Facebook.value (/user_code/node_modules/fb/lib/fb.js:479:26)
    at Facebook.value (/user_code/node_modules/fb/lib/fb.js:399:22)
    at Facebook.api (/user_code/node_modules/fb/lib/fb.js:276:16)

on doing this,

FB.api('oauth/access_token', {
    client_id: 'app_id',
    client_secret: 'app_secret',
    grant_type: 'client_credentials'
}, function (res) {
    if(!res || res.error) {
        console.log(!res ? 'error occurred' : res.error);
        return;
    }
 
    var accessToken = res.access_token;
});

[dantman]

@satheeshwaran This repository is obsolete. Please try upgrading to the current version of the library which is now at: https://github.com/node-facebook/facebook-node-sdk

[satheeshwaran]

@dantman Thanks for the quick reply but the code seems to be the same. Don't know what is wrong.