我在一天之内几次遇到此错误，并且我的网站已关闭，它不知从何而来。我需要修复什么，所以我不再收到此错误？
Fatal error: Uncaught exception 'Exception' with message 'String could not be parsed as XML' in /hosting/dfashion/public_html/mysite/v2/templates/it_thecity/icetools/icetool.php:219 Stack trace: #0 /hosting/dfashion/public_html/mysite/v2/templates/it_thecity/icetools/icetool.php(219): SimpleXMLElement->__construct('') #1 /hosting/dfashion/public_html/mysite/v2/templates/it_thecity/icetools/layout_vars.php(44): iceTool::getYoutubeSubscribers('icetheme') #2 /hosting/dfashion/public_html/mysite/v2/templates/it_thecity/index.php(29): require_once('/hosting/dfashi...') #3 /hosting/dfashion/public_html/mysite/v2/libraries/joomla/document/html/html.php(531): require('/hosting/dfashi...') #4 /hosting/dfashion/public_html/mysite/v2/libraries/joomla/document/html/html.php(591): JDocumentHTML->_loadTemplate('/hosting/dfashi...', 'index.php') #5 /hosting/dfashion/public_html/mysite/v2/libraries/joomla/document/html/html.php(414): JDocumentHTML->_fetchTemplate(Array) #6 /hosting/dfashion/public_html/ in /hosting/dfashion/public_html/mysite/v2/templates/it_thecity/icetools/icetool.php on line 219