ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/ud3px9y35yop/public_html/genealogy/includes/classes/class_pgv_db.php on line 405