RestAPI Application Link PHP Error

Getting this error after clicking REST API in applications, currently on version 13.0.6

0.
/­var/­www/­html/­admin/­modules/­restapi/­page.restapi.php0
Whoops \ Exception \ ErrorException (E_ERROR)
HELP
Class 'Whoops\Util\TemplateHelper' not found
/var/www/html/admin/modules/restapi/page.restapi.php
<?php @Zend;
0575;
?>
1
 
REST API 13.0.6
Copyright 2015 by Schmoozecom, Inc., All rights reserved
 
By installing, copying, downloading, distributing, inspecting or using 
the materials provided herewith, you agree to all of the terms of use as 
Server/Request Data
HTACCESS	on
HTTP_HOST	10.1.10.109
HTTP_CONNECTION	keep-alive
HTTP_ACCEPT	text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_USER_AGENT	Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.132 Safari/537.36
HTTP_REFERER	http://10.1.10.109/admin/config.php?display=restapps
HTTP_ACCEPT_ENCODING	gzip, deflate, sdch
HTTP_ACCEPT_LANGUAGE	en-US,en;q=0.8
HTTP_COOKIE	lang=en_US; PHPSESSID=bcberb8olhqh096efjtbakmbu6; __utmt=1; __utma=125930509.269308108.1436466102.1436466102.1436466102.1; __utmb=125930509.60.10.1436466102; __utmc=125930509; __utmz=125930509.1436466102.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)
PATH	/sbin:/usr/sbin:/bin:/usr/bin
SERVER_SIGNATURE	<address>Apache/2.2.15 (CentOS) Server at 10.1.10.109 Port 80</address>
SERVER_SOFTWARE	Apache/2.2.15 (CentOS)
SERVER_NAME	10.1.10.109
SERVER_ADDR	10.1.10.109
SERVER_PORT	80
REMOTE_ADDR	10.1.10.113
DOCUMENT_ROOT	/var/www/html
SERVER_ADMIN	root@localhost
SCRIPT_FILENAME	/var/www/html/admin/config.php
REMOTE_PORT	57926
GATEWAY_INTERFACE	CGI/1.1
SERVER_PROTOCOL	HTTP/1.1
REQUEST_METHOD	GET
QUERY_STRING	display=restapi
REQUEST_URI	/admin/config.php?display=restapi
SCRIPT_NAME	/admin/config.php
PHP_SELF	/admin/config.php
REQUEST_TIME	1436468672
GET Data
display	restapi
POST Data
empty
Files
empty
Cookies
lang	en_US
PHPSESSID	bcberb8olhqh096efjtbakmbu6
__utmt	1
__utma	125930509.269308108.1436466102.1436466102.1436466102.1
__utmb	125930509.60.10.1436466102
__utmc	125930509
__utmz	125930509.1436466102.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)
Session
module_name	restapps
module_page	restapps
AMP_user	ampuser Object ( [username] => matthewmalk248 [id] => [password:ampuser:private] => 726d2ade7c416b098bc1b85dbaf9cc25cb26d530 [extension_high:ampuser:private] => [extension_low:ampuser:private] => [sections:ampuser:private] => Array ( [0] => * ) [mode:ampuser:private] => database [_lastactivity] => 1436468672 )
Environment Variables
empty
Registered Handlers
0. Whoops\Handler\PrettyPageHandler