By using Guzzle in Laravel to get some API data from twitter or facebook, you can get this message:
cURL error 60: SSL certificate problem
and if in your composer file you have guzzle version 6.*.* like this:
"guzzlehttp/guzzle": "~6.1.1", "guzzlehttp/oauth-subscriber": "dev-master",
then you probably calling guzzle by using this command:
$client = new GuzzleHttp\Client([ 'handler' => $stack ]);
which is quit OK except it can not get data from SSL domains, so only thing that you need to do is disable cert verification by adding line verify=false inside array parameters:
$client = new GuzzleHttp\Client([ 'handler' => $stack, 'verify' => false ]);
and problem solved