Error: simplexml_load_string(): Entity: line 1: parser error : Space required after the Public Identifier

Url: http://apiwebs3.inmotek.net/irizarbilbao_66e4ce742a4c44716d8dceb06e7aff25__search_0_1000.xml?&tipo=Local&id_promocion=6

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
</body></html>

Fatal error: Uncaught exception 'ErrorException' with message 'Trying to get property of non-object' in /var/www/vhosts/alhondigaresidencial.com/httpdocs/modulos/locales_planta1.php:5 Stack trace: #0 /var/www/vhosts/alhondigaresidencial.com/httpdocs/modulos/locales_planta1.php(5): exception_error_handler(8, 'Trying to get p...', '/var/www/vhosts...', 5, Array) #1 /var/www/vhosts/alhondigaresidencial.com/httpdocs/paginas/localizacion_locales.php(17): include('/var/www/vhosts...') #2 /var/www/vhosts/alhondigaresidencial.com/httpdocs/index.php(124): include('/var/www/vhosts...') #3 {main} thrown in /var/www/vhosts/alhondigaresidencial.com/httpdocs/modulos/locales_planta1.php on line 5