You may get an error returned from error log (example from CentOS):

PHP Fatal error:  Class ‘SoapClient’ not found in

 

Create a php file (e.g. info.php) with the following code in your server :

<?php phpinfo();?>

 

Access to the page (e.g. http://yourdomain.com/info.php) and check whether the soap is installed and enabled

Or

You can check if the php soap module is installed by command

# php -me | grep soap

 

It should return “soap” if it is installed. Otherwise, you should run the command below to install the missing php module.

# yum install php-soap
# service httpd restart