Warning: require_once(../src/contrib/Google_PlusService.php): failed to open stream: No such file or directory in /var/www/otrs/app/public/plugins/google-api-php-client/test/general/ServiceTest.php on line 20

Fatal error: require_once(): Failed opening required '../src/contrib/Google_PlusService.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/otrs/app/public/plugins/google-api-php-client/test/general/ServiceTest.php on line 20