This is an error we've found by someone who sent us an email. I'm assuming that was you
The problem is we are using some code that requires PHP 5.4 or higher. Joomla technically requires PHP 5.3 or higher, which means our code doesn't work. We'll be fixing this in the next update. However, I'd also highly recommend contacting your hosting provider to see if you are able to upgrade your PHP version. PHP 5.3 was 'end of lifed' over a year ago. Its first release was in 2009 and the last update was in 2014, which is an eternity ago.
Again, we'll get this issue fixed and we can get a special build out for you with this fix as well if you are unable to ask your hosting provider to upgrade. Just let us know and we can generate a new package and email it to you (or install for you).
Thanks,
Alex