Opencart Lightning Extension and Opencart 2.3.0.2

Has anyone had any experience using the Opencart Lightning Extension and Opencart 2.3.0.2???

I am looking to increase the speed of my site and this extension when I trialled it increased the speed significantly but I also had just upgraded to PHP 7 (The extension requested the upgrade) and then noticed I was getting PHP errors in the log. I am not sure if this is due to extension or maybe other extensions I have hence the reason I am asking if anyone has used or is using this extension.

I am currently using the following.
OpenCart 2.3.0.2
Journal Theme (Latest revision)
Multiple extensions
PHP version 5.6.32
SSL enabled
SEO URLS - disabled (not sure how to set this up)
Operating System - Linux webcloud10.au.syrahost.com 2.6.32-773.26.1.lve1.4.35.el6.x86_64 #1 SMP Tue Sep 26 06:34:34 EDT 2017 x86_64
Web Server - Apache/2.2.34 (Unix) mod_ssl/2.2.34 OpenSSL/1.0.1e-fips mod_bwlimited/1.4 Phusion_Passenger/5.1.11 mod_perl/2.0.8 Perl/v5.10.1
Database Driver - MYSQLI
Database Server Version - 10.0.31-MariaDB-cll-lve

(The extension requested the upgrade) and then noticed I was getting PHP errors in the log.

What are the error logs you did noticed?