Magento 2 : This site can’t be reached When download backup file

I take system backup excluding media from Magento 2 Admin. Backup file is created successfully. But when I’m going to download getting below error.

This site can’t be reached
The web page at https://example.com/index.php/admin/backup/index/downloaditime/1711689844/typ e/nomedia/key/40fdb74a8797282daed44b467d378783d0fb878ddf7328 d0095e3afafe6823a8/ might be temporarily down or it may have moved permanently to a new web address.
ERR_INVALID_RESPONSE

I don’t have server access. Is there any way to fix issue and download this?