Fatal error: Class 'mPDF' not found in myproject/vendor/kartik-v/yii2-mpdf/Pdf.php on line 281 - yii2

Question

I have used kartik pdf extension to print my report in pdf format.Things are going well in my local computer but when i put my codes in server error appears like this:
Fatal error: Class 'mPDF' not found in myproject/vendor/kartik-v/yii2-mpdf/Pdf.php on line 281
In server i have uploaded yii2-mpdf folder inside kartik-v folder and also mpdf folder.
My code of controller for pdf print:
use kartik\mpdf\Pdf;
public function actionPearlFinancialReport()
{
$pdf = new Pdf([
//'mode' => Pdf::MODE_CORE,
'mode' => Pdf::MODE_UTF8,
'format' => Pdf::FORMAT_A4,
'orientation' => Pdf::ORIENT_PORTRAIT,
'destination' => Pdf::DEST_BROWSER,
'content' => $this->renderPartial('_financial_report', ['model' => $model,'parameter'=>$parameter]),
'cssFile' => '#vendor/kartik-v/yii2-mpdf/assets/kv-mpdf-bootstrap.min.css',
'cssInline'=> '.kv-heading-1{font-size:15px;text-align:center;}',
'options' => ['title' => 'Pearl Financial Report'],
'methods' => [
'SetHeader'=>['Pearl Financial Report'],
'SetFooter'=>['{PAGENO}'],
]
]);
$response = Yii::$app->response;
$response->format = \yii\web\Response::FORMAT_RAW;
$headers = Yii::$app->response->headers;
$headers->add('Content-Type', 'application/pdf');
}
What to do?

Answer 1

Try this
'cssFile' => '#vendor/kartik-v/yii2-mpdf/src/assets/kv-mpdf-bootstrap.min.css',

Answer 2

Try to register this extension with composer:
For example my work directory is c:\xampp\htdocs\my-project
In a command prompt -> cd c:\xampp\htdocs\my-project
And register with this command:
C:\xampp\htdocs\my-project>php c:\xampp\htdocs\composer.phar require kartik-v/yii2-mpdf "dev-master"
I always register kartik's extensions with this metod, I hope want to be useful for you too.