Symphony.

Symphony Fatal Error: Error compiling xml with xslt: XSLTProcessor::importStylesheet(): I/O warning : failed to load external entity "/var/www/workspace/email-templates/new-user/workspace/utilities/admin-email.xsl"

An error occurred in /var/www/extensions/email_template_manager/lib/class.emailtemplate.php around line 191
    186                     if($res){
    187                         $result[strtolower($type)] = $res;
    188                     }
    189                     else{
    190                         $error = $this->getError();
    191                         throw new EmailTemplateException('Error compiling xml with xslt: ' . $error[1]['message']);
    192                     }
    193
    194                 }
    195             } 
Backtrace
    [/var/www/extensions/email_template_manager/lib/class.emailtemplate.php:201]
        EmailTemplate->render();
    [/var/www/extensions/email_template_manager/content/content.templates.php:301]
        EmailTemplate->preview();
    [/var/www/symphony/lib/toolkit/class.administrationpage.php:630]
        contentExtensionemail_template_managertemplates->__viewPreview();
    [/var/www/extensions/email_template_manager/lib/class.extensionpage.php:20]
        AdministrationPage->__switchboard();
    [/var/www/symphony/lib/toolkit/class.administrationpage.php:587]
        ExtensionPage->__switchboard();
    [/var/www/extensions/email_template_manager/lib/class.extensionpage.php:26]
        AdministrationPage->view();
    [/var/www/extensions/email_template_manager/content/content.templates.php:313]
        ExtensionPage->view();
    [/var/www/symphony/lib/toolkit/class.administrationpage.php:429]
        contentExtensionemail_template_managertemplates->view();
    [/var/www/extensions/email_template_manager/content/content.templates.php:328]
        AdministrationPage->build();
    [/var/www/symphony/lib/core/class.administration.php:254]
        contentExtensionemail_template_managertemplates->build();
    [/var/www/symphony/lib/core/class.administration.php:442]
        Administration->__buildPage();
    [/var/www/index.php:22]
        Administration->display();
Database Query Log
    [0.0001] SET character_set_connection = 'utf8', character_set_database = 'utf8', character_set_server = 'utf8';
    [0.0001] SET CHARACTER SET 'utf8';
    [0.0002] SELECT SQL_CACHE t1.name, t2.page, t2.delegate, t2.callback FROM `sym_extensions` as t1 INNER JOIN `sym_extensions_delegates` as t2 ON t1.id = t2.extension_id WHERE t1.status = 'enabled' ORDER BY t2.delegate, t1.name;
    [0.0001] SELECT SQL_CACHE `session_data` FROM `sym_sessions` WHERE `session` = 'xxxxxxxxxxxxxxxxxxxxxxxxx' LIMIT 1;
    [0.0001] SELECT SQL_CACHE a.* FROM `sym_authors` AS `a` WHERE `username` = 'xxxx' ORDER BY a.id ASC LIMIT 1;
    [0.0002] UPDATE sym_authors SET `last_seen` = '2013-02-27 14:23:02' WHERE `id` = 1;
    [0.0001] SELECT SQL_CACHE `name` FROM `sym_extensions` WHERE `status` = 'enabled';
    [0.0001] SELECT SQL_CACHE * FROM `sym_extensions`;
    [0.0002] SELECT SQL_CACHE `s`.* FROM `sym_sections` AS `s` ORDER BY `s`.`sortorder` asc;
    [0.0002] SELECT SQL_CACHE * FROM sym_anti_brute_force_wl WHERE IP = '192.168.1.131' LIMIT 1;
    [0.0001] SELECT SQL_CACHE * FROM sym_anti_brute_force_bl WHERE IP = '192.168.1.131' LIMIT 1;
    [0.0002] SELECT SQL_CACHE * FROM sym_anti_brute_force WHERE IP = '192.168.1.131' AND UNIX_TIMESTAMP(LastAttempt) + (60 * 60) > UNIX_TIMESTAMP() AND FailedCount >= 5 LIMIT 1;
    [0.0001] SET character_set_connection = 'utf8', character_set_database = 'utf8', character_set_server = 'utf8';
    [0.0001] SET CHARACTER SET 'utf8';
    [0.0002] SELECT SQL_CACHE a.* FROM `sym_authors` AS `a` WHERE `username` = 'glen' ORDER BY a.id ASC LIMIT 1;
    [0.0001] UPDATE sym_authors SET `last_seen` = '2013-02-27 14:23:02' WHERE `id` = 1;
    [0.0001] SELECT SQL_CACHE `id` FROM `sym_fields` WHERE 1 AND `parent_section` = 9 AND `element_name` IN ('name') ORDER BY `sortorder` ASC;
    [0.0000] SELECT SQL_CACHE t1.* FROM sym_fields AS `t1` WHERE 1 AND t1.`id` IN(46);
    [0.0001] SELECT SQL_CACHE * FROM `sym_fields_input` WHERE `field_id` IN (46);
    [0.0002] SELECT SQL_CACHE `e`.id, `e`.section_id, e.`author_id`, UNIX_TIMESTAMP(e.`creation_date`) AS `creation_date`, UNIX_TIMEST