Export blade using laravel-dompdf version 2.0 – Blancer.com Tutorials and projects

i try to export a blade view using the package barryvdh/laravel-dompdf
but i get an error

Undefined array key “” in
/var/www/html/vendor/dompdf/dompdf/lib/Cpdf.php line 4752
/var/www/html/vendor/dompdf/dompdf/src/Adapter/CPDF.php”, line: 806, function: “getFontHeight”,
…..
etc…..
/var/www/html/app/Http/Controllers/PdfController.php”,
line: 193

Here is my PdfController line 193

192: $pdf = Pdf::loadView("template.pdf"); 
193: Storage::disk('local')->put('public/pdf/test.pdf',$pdf->output());

here is my template/pdf.blade.php

<!DOCTYPE html>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>PDF </title>
</head>

<body>TEST</body>
</html>

but when I try with barryvdh/laravel-dompdf version 1.0, iIt outputs correctly.What’s the problem?