7.10.x API V8 Error

PHP 7.x
MySQL 5.6
CentOS 6.9
Apache 2.4
SuiteCRM 7.10.4

I am trying to get 7.10.4 API V8 working. I’ve following the direction in the documentation as well as the code example. Below is the code:

******************************************** Code *****************************************************************

    echo 'start'. "\n";
    $ch = curl_init();
    $header = array( 'Content-type: application/vnd.api+json',
                     'Accept: application/vnd.api+json',

    $postStr = json_encode(array(
                                 'grant_type' => 'client_credentials',
                                 'client_id' => 'b0277ade-13ec-fabb-693a-aaaaaaaaa',
                                 'client_secret' => 'myclientsecret',
                                 'scope' => ''
    $url = 'https://myurl.com/api/oauth/access_token';

    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postStr);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

    $output = curl_exec($ch);
    echo "The response(output):\n";
    // Check HTTP status code
    if (!curl_errno($ch)) {
      switch ($http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE)) {
        case 200:  # OK
          echo 'Unexpected HTTP code: ', $http_code, "\n";

    echo 'completed' . "\n";

*********************************************************ERROR MESSAGE *********************************************************************************
I receive the generic http error code of 500.

The following comes from the error log with logging level set to debug:

[19-Apr-2018 21:18:24 America/New_York] PHP Fatal error:  Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in .../ensitecmdev03/vendor/slim/slim/Slim/App.php:604
Stack trace:
#0 .../ensitecmdev03/vendor/slim/slim/Slim/App.php(316): Slim\App->finalize(Object(Slim\Http\Response))
#1 .../ensitecmdev03/lib/API/core/app.php(83): Slim\App->run()
#2 .../ensitecmdev03/lib/API/public/index.php(5): require_once('/home/hhadmin/a...')
#3 {main}
  thrown in .../ensitecmdev03/vendor/slim/slim/Slim/App.php on line 604

Any insight you may provide would be grateful.

Thank you,

@judgerod sorry for the late reply.

From an initial look I don’t see anything wrong with your code. I haven’t seen this issue before.

Have a look at this list to see if there’s anything similar


if not, then please open a new Issue with this. Thanks.

Thanks any way. I’m going to setup a new instance to see if I have the same issue. Will keep you posted.

May help you depending on how you configured your installation.