Call to a member function each() on a non-object

[vekvoid]

Hello,

I'm getting the following error: Call to a member function each() on a non-object At line 405 (/vendor/chumper/zipper/src/Chumper/Zipper/Zipper.php)

I'm on PHP 5.3.3.

EDIT: The problem is that on PHP 5.3.3 is_subclass_of() doesn't work with Interfaces because this functionality was added on PHP 5.3.7. http://php.net/manual/es/function.is-subclass-of.php