I tried to download an old Akeeba Backup version 4.4.7 from https://www.akeeba.com/download/akeeba-backup/4-7-7.html
After I clicked the "Download" button,
I was redirected to a page with URL https://cdn.akeebabackup.com/downloads/akeebabackup/4.7.7/com_akeeba-4.7.7-core.zip
that displayed an error message:
This site can’t be reached
Check if there is a typo in cdn.akeebabackup.com.
DNS_PROBE_FINISHED_NXDOMAIN
I asked a few other people and they encountered the same issue.