Tampilan Qr Code tidak sempurna

mohon tanya kepada para ahli disini ya,

saya sudah buat script penggunaan qrcode seperti di bawah ini , namun hanya berlaku di lokalhost ketika saya hosting hasilnya malah serpeti ini :

juma-Qrcode41.png

$this->load->library('Ciqrcode'); //pemanggilan library QR CODE

$config['cacheable'] = true; //boolean, the default is true

$config['cachedir'] = './assets/img/data/'; //string, the default is application/cache/

$config['errorlog'] = './assets/img/data/'; //string, the default is application/logs/

$config['imagedir'] = './assets/img/data/'; //direktori penyimpanan qr code

$config['quality'] = true; //boolean, the default is true

$config['size'] = '1024'; //interger, the default is 1024

$config['black'] = array(224,255,255); // array, default is array(255,255,255)

$config['white'] = array(70,130,180); // array, default is array(0,0,0)

$this->ciqrcode->initialize($config);

$idQrCode = $this->model_globalfunc->create_random(10);

$image_name=$idQrCode.'.png'; //buat name dari qr code sesuai dengan nim

                header("Content-Type: image/png");

$params['data'] = $idQrCode; //data yang akan di jadikan QR CODE

$params['level'] = 'H'; //H=High

$params['size'] = 10;

$params['savename'] = FCPATH.$config['imagedir'].$image_name; //simpan image QR CODE ke folder assets/images/

$this->ciqrcode->generate($params); // fungsi untuk generate QR CODE