Curl http request time out

In http request it working fine (local environment), but when I change to cloudflare Full (strict), it return error of time out. I try to add my ssl certificate config, but still not working!

nginx/Site-enabled

ssl_certificate /etc/ssl/cert.pem;ssl_certificate_key /etc/ssl/key.pem;

POST request

      public function applyFabricToken()      {        $ch = curl_init();        $headers = array("Content-Type: application/json","X-APP-Key: " . $this->fabricAppId        );        curl_setopt($ch, CURLOPT_URL, $this->BASE_URL . "/payment/v1/token");        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);        curl_setopt($ch, CURLOPT_HEADER, 0);        $payload =  array("appSecret" => $this->appSecret        );        //print_r(json_encode($payload));exit;        $data = json_encode($payload);        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);        //curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);// for dev env        //curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); // for dev environment only        // Enable SSL verification for production        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);        //curl_setopt($ch, CURLOPT_SSLCERT, '/path/to/your/client_cert.pem');        //curl_setopt($ch, CURLOPT_SSLKEY, '/path/to/your/client_key.pem');         // Timeout in seconds        curl_setopt($ch, CURLOPT_TIMEOUT, 30);        $authToken = curl_exec($ch);        return $authToken;      }

Error Timeout