Good afternoon I am trying to generate a pdf through the Dompdf library but I have had the error that I present in the title of the question. I would like to know in what way this could be solved. Thank you PHP CODE:
<?php
require_once("dompdf/dompdf_config.inc.php");
$conexion=mysqli_connect('127.0.0.1','root','','freatico') or die('Error en la conexion a la base de datos');
$codigoHTML='
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Reporte en PDF</title>
<link rel="stylesheet" type="text/css" href="hojaestilo.css">
</head>
<body>
<table width="100%" border="1px" cellspacing="0" cellpadding="0">
<tr>
<td colspan="6" bdcolor="skyblue">REPORTE PDF TABLA MEDICIÓN</td>
</tr>
<tr>
<td><strong>Identificación del Punto</strong></td>
<td><strong>Nivel Freatico (M)</strong></td>
<td><strong>Hora(24hrs)</strong></td>
<td><strong>Fecha (dd/mm/a)</strong></td>
<td><strong>Cedula Ciudadania - Persona a cargo</strong></td>
<td><strong>Estado del punto</strong></td>
</tr>';
$sql="SELECT * FROM medicion";
$resultado=mysqli_query($conexion,$sql) or die ('Error en el query database');
while($res=mysqli_fetch_array($resultado)){
$codigoHTML.='
<tr>
<td>'.$res['idp'].'</td>
<td>'.$res['Nivel'].'</td>
<td>'.$res['Hora'].'</td>
<td>'.$res['Fecha'].'</td>
<td>'.$res['CCP'].'</td>
<td>'.$res['SMS'].'</td>
</tr>';
}
$codigoHTML.='
</table>
</body>
</html>';
$codigoHTML=utf8_encode($codigoHTML);
$dompdf=new DOMPDF();
$dompdf->load_Html ($codigoHTML);
ini_set("memory_limit","128M");
$dompdf->render();
$dompdf->stream("Reporte_Tabla_Medicion.pdf");
?>