REGEX: ~(require|include)(_once)?\(([^)]+)~

help me please! i dont understand...
thank you!

FILE: system/engine/action.php
REGEX: ~(require|include)(_once)?\(([^)]+)~
LINE: 41

FILE: system/engine/loader.php
REGEX: ~(require|include)(_once)?\(([^)]+)~
LINE: 49
LINE: 108
LINE: 120
LINE: 165

FILE: system/library/config.php
REGEX: ~(require|include)(_once)?\(([^)]+)~
LINE: 23

FILE: system/library/language.php
REGEX: ~(require|include)(_once)?\(([^)]+)~
LINE: 38
LINE: 40
LINE: 49
LINE: 51
LINE: 60
LINE: 62

FILE: system/library/template/php.php
REGEX: ~(require|include)(_once)?\(([^)]+)~
LINE: 18

FILE: system/library/template/tiwg.php
REGEX: ~(require|include)(_once)?\(([^)]+)~
LINE: 24

I am having a very similar issue, I did a fresh install and keep receiving the same errors.
It is creating cache files and causing much trouble to the site. I had to take it down completely. Spent all day troubleshooting yesterday with no resolve.

My similar topic is here: http://forum.opencart.com/viewtopic.php?f=181&t=166779

I hope someone can help us.