推动网站迁移错误

My website directory was moved to another server but the database is still the same. Will this cause an issue on Propel? Because I'm getting this error:

Fatal error: require_once(): Failed opening required 'propel/Propel.php' (include_path='/www/inc:/var/www/www.samplesite.com/classes:.:/usr/share/php:/usr/share/pear') in /var/www/www.samplesite.com/config.php on line 7

Or is this error caused by something else, not Propel?

Do I perhaps need to execute a rebuild of the Propel installation in order to correct the paths by itself?