Update error - Fatal error: Class 'N2ZipRead' not found in .../libraries/nextend2/nextend/joomla/platform.php

Error message during update

Fatal error: Class 'N2ZipRead' not found in .../libraries/nextend2/nextend/joomla/platform.php

Cause

We had to update our zipping code, which required modifying this part of the code. Because of this, the update cannot work properly, as the previous zip file related codes are no longer in the installer.

Solution

Manually update your Smart Slider, as you see  here for Joomla and here for the HTML App.