New Install Blank Index Page

Set up a new installation on a CPanel Server running Cloudlinux 7.6, Litespeed Webserver and PHP 7.1. All ran through fine but index.php is just bringing up a blank page.

Error log is showing
10-Aug-2019 15:19:31 UTC] PHP Fatal error: require_once(): Failed opening required ‘federation/appinfo/app.php’ (include_path=’.:/usr/php4/lib/php:/usr/local/php4/lib/php:/usr/lib/php:/usr/local/lib/php:/home/path/php’) in /{domain}/lib/private/legacy/app.php on line 262

which shows

private static function requireAppFile(string $app) {
// encapsulated here to avoid variable scope conflicts
require_once $app . ‘/appinfo/app.php’;

I’ve trawled through Google, forums etc but not found anything to help and not sure why I’m getting a reference to PHP4

Any help would be most welcome