Fatal error: Call to undefined function openssl_random_pseudo_bytes()

Your version of PHP wasn't compiled with the openssl module. If you are building from source, add the module like so:

cd /path/to/php-5.4/
./configure --with-openssl

I had the same issue. I solved it by editing my php.ini file - changing ;extension=php_openssl.dll to extension=php_openssl.dll .

(For my installation, my php.ini file was located in my P:\Program Files\EasyPHP-12.1\conf_files\ directory.)