// get basic installation information and save them to the config cache
$configCache = $a->getConfigCache();
- self::$installer->setUpCache($configCache, BasePath::create($a->getBasePath(), $_SERVER));
+ $basePath = new BasePath($a->getBasePath());
+ self::$installer->setUpCache($configCache, $basePath->getPath());
// We overwrite current theme css, because during install we may not have a working mod_rewrite
// so we may not have a css at all. Here we set a static css file for the install procedure pages