Call to undefined function simplexml_load_string()
I am getting this error on all the sites located on our server. Everything was working correctly until today and all of sudden this error poped up.
I have checked Simplexml and it is already installed on the server. Here is the error:
Fatal error: Call to undefined function simplexml_load_string() in .../lib/Varien/Simplexml/Config.php on line 510