Have a look at your php.ini file and check that the fileinfo.soor php_fileinfo.dll is activated (depending on your platform and version).
There should be a line similar to
extension=fileinfo.so
in your php.ini file
Have a look at your php.ini file and check that the fileinfo.soor php_fileinfo.dll is activated (depending on your platform and version).
There should be a line similar to
extension=fileinfo.so
in your php.ini file