GoFuckYourself.com - Adult Webmaster Forum - NTS installation errors; can anyone help please

Since the support forum is dead I'm posting this here. I'm trying to install Nubiles Tube Script but having some trouble.

Code:

Warning: main(/nts/function/adminFunction.php) [function.main]: failed to open stream: No such file or directory in /usr/home/***/domains/***.com/public_html/nts/init.php on line 162



Fatal error: main() [function.require]: Failed opening required '/nts/function/adminFunction.php' (include_path='.:/usr/local/lib/php') in /usr/home/***/domains/***.com/public_html/nts/init.php on line 162

Files are present, permissions correct, and uploaded php files in binary. Any idea what could cause this error?

Thanks