My problem is quite simple.
I can't download the iso from 2023-03-16 release.
Firefox says that the download failed.
With it, I have the option to restart it, but it would result in the same error.
$ wget https://git.getcryst.al/crystal/misc/iso/-/jobs/195/artifacts/raw/iso/crystal-live-2023-03-16-x86_64.iso
--2023-07-06 *** -- https://git.getcryst.al/crystal/misc/iso/-/jobs/195/artifacts/raw/iso/crystal-live-2023-03-16-x86_64.iso
Loaded CA certificate '/etc/ssl/certs/ca-certificates.crt'
Resolving git.getcryst.al (git.getcryst.al)... ***, ***
Connecting to git.getcryst.al (git.getcryst.al)|***|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1861890048 (1.7G) [application/octet-stream]
Saving to: ‘crystal-live-2023-03-16-x86_64.iso’
crystal-live-2023-03-16-x86_64.iso 58%[===================================================> ] 1.01G 9.14MB/s in 1m 57s
2023-07-06 07:19:26 (8.84 MB/s) - Connection closed at byte 1084371527. Retrying.
--2023-07-06 *** -- (try: 2) https://git.getcryst.al/crystal/misc/iso/-/jobs/195/artifacts/raw/iso/crystal-live-2023-03-16-x86_64.iso
Connecting to git.getcryst.al (git.getcryst.al)|***|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1861890048 (1.7G) [application/octet-stream]
Saving to: ‘crystal-live-2023-03-16-x86_64.iso’
crystal-live-2023-03-16-x86_64.iso 58%[===================================================> ] 1.01G 8.21MB/s in 2m 1s
2023-07-06 07:21:28 (8.57 MB/s) - Connection closed at byte 1084763895. Retrying.
It would have been great, if I could download old iso(s), but those are unavailable.