В админке сделайте так
// DIR
define('DIR_APPLICATION', '/home/l/l91958rs/testsite/public_html/admin/');
define('DIR_SYSTEM', '/home/l/l91958rs/testsite/public_html/system/');
define('DIR_LANGUAGE', '/home/l/l91958rs/testsite/public_html/admin/language/');
define('DIR_TEMPLATE', '/home/l/l91958rs/testsite/public_html/admin/view/template/');
define('DIR_CONFIG', '/home/l/l91958rs/testsite/public_html/system/config/');
define('DIR_IMAGE', '/home/l/l91958rs/testsite/public_html/image/');
define('DIR_CACHE', '/home/l/l91958rs/testsite/public_html/system/storage/cache/');
define('DIR_DOWNLOAD', '/home/l/l91958rs/testsite/public_html/system/storage/download/');
define('DIR_LOGS', '/home/l/l91958rs/testsite/public_html/system/storage/logs/');
define('DIR_MODIFICATION', '/home/l/l91958rs/testsite/public_html/system/storage/modification/');
define('DIR_UPLOAD', '/home/l/l91958rs/testsite/public_html/system/storage/upload/');
define('DIR_CATALOG', '/home/l/l91958rs/testsite/public_html/catalog/');
В корне сайта - так
// DIR
define('DIR_APPLICATION', '/home/l/l91958rs/testsite/public_html/catalog/');
define('DIR_SYSTEM', '/home/l/l91958rs/testsite/public_html/system/');
define('DIR_LANGUAGE', '/home/l/l91958rs/testsite/public_html/catalog/language/');
define('DIR_TEMPLATE', '/home/l/l91958rs/testsite/public_html/catalog/view/theme/');
define('DIR_CONFIG', '/home/l/l91958rs/testsite/public_html/system/config/');
define('DIR_IMAGE', '/home/l/l91958rs/testsite/public_html/image/');
define('DIR_CACHE', '/home/l/l91958rs/testsite/public_html/system/storage/cache/');
define('DIR_DOWNLOAD', '/home/l/l91958rs/testsite/public_html/system/storage/download/');
define('DIR_LOGS', '/home/l/l91958rs/testsite/public_html/system/storage/logs/');
define('DIR_MODIFICATION', '/home/l/l91958rs/testsite/public_html/system/storage/modification/');
define('DIR_UPLOAD', '/home/l/l91958rs/testsite/public_html/system/storage/upload/');