从心灵身体api获取课程安排

Question

i have two scripts through which i am trying to fetch class schedule from mindbody api. For this i am refereing the documents from github devincrossman mindbody api

Code on first page index.php starts from the following code

require 'MB_API.php';
$mb = new \DevinCrossman\Mindbody\MB_API(array(
    "SourceName"=>'ABC', 
    "Password"=>'ABC', 
    "SiteIDs"=>array('123')
));

and code on second page MB_API.php starts from

namespace DevinCrossman\Mindbody;
class MB_API {
    protected $client;
    protected $sourceCredentials = array(
        "SourceName"=>'ABC', 
        "Password"=>'ABC', 
        "SiteIDs"=>array('123')
    );

It was working fine, but recently i switched my server and now it is not working, it is supposed to show the schedule of all classes.

now i am getting error

Unexpected character in input:  '\' (ASCII=92) state=1 on line 3
syntax error, unexpected T_STRING on line 3 in index.php (i.e $mb = new \DevinCrossman\Mindbody\MB_API(array()
syntax error, unexpected T_STRING on line 2 in MB_API.php (i.e namespace DevinCrossman\Mindbody;)

Can anyone please tell why this error is present although it used to work fine earlier