Is the Web server on repo.skype.com down?

For at least three days (today is 2024-06-01), repo.skype.com has been useless though up:

# cat /etc/apt/sources.list.d/skype-stable.list
deb [arch=amd64] https://repo.skype.com/deb  stable main
# aptitude update
Hit http://security.debian.org/debian-security  oldoldstable/updates InRelease
Hit http://debian.mirror.lrz.de/debian  oldoldstable InRelease                                                                                             
Hit http://debian.mirror.lrz.de/debian  oldoldstable-updates InRelease
Hit http://debian.mirror.lrz.de/debian  oldstable InRelease
Hit http://security.debian.org/debian-security  oldstable-security InRelease
Hit http://security.debian.org/debian-security  stable-security InRelease
Hit http://debian.mirror.lrz.de/debian  oldstable-updates InRelease                                                                                        
Hit http://debian.mirror.lrz.de/debian  stable InRelease                                                                                                   
Hit http://debian.mirror.lrz.de/debian  stable-updates InRelease                                                 
Ign https://repo.vivaldi.com/stable/deb  stable InRelease
Hit https://repo.vivaldi.com/stable/deb  stable Release              
Hit https://updates.signal.org/desktop/apt  xenial InRelease          
Get: 1 https://packages.microsoft.com/ubuntu/22.04/mssql-server-2022  jammy InRelease [3,624 B]
Hit https://packages.microsoft.com/ubuntu/22.04/prod  jammy InRelease
Get: 2 https://packages.microsoft.com/repos/code  stable InRelease [3,590 B]
Ign https://repo.skype.com/deb  stable InRelease                                                                                                           
Ign https://repo.skype.com/deb  stable InRelease
Ign https://repo.skype.com/deb  stable InRelease
Err https://repo.skype.com/deb  stable InRelease
  504  Gateway Time-out [IP: 2a02:26f0:12d:5ac::1263 443]
Fetched 7,214 B in 1min 48s (66 B/s)
W: Failed to fetch https://repo.skype.com/deb/dists/stable/InRelease : 504  Gateway Time-out [IP: 2a02:26f0:12d:5ac::1263 443]
W: Some index files failed to download. They have been ignored, or old ones used instead.
                                         
# ping4 repo.skype.com
PING  (104.108.144.148) 56(84) bytes of data.
64 bytes from a104-108-144-148.deploy.static.akamaitechnologies.com (104.108.144.148): icmp_seq=1 ttl=54 time=22.4 ms
64 bytes from a104-108-144-148.deploy.static.akamaitechnologies.com (104.108.144.148): icmp_seq=2 ttl=54 time=22.6 ms
64 bytes from a104-108-144-148.deploy.static.akamaitechnologies.com (104.108.144.148): icmp_seq=3 ttl=54 time=22.7 ms
64 bytes from a104-108-144-148.deploy.static.akamaitechnologies.com (104.108.144.148): icmp_seq=4 ttl=54 time=22.4 ms
^C
---  ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 22.361/22.520/22.684/0.132 ms
# ping6 repo.skype.com
PING repo.skype.com(g2a02-26f0-012d-05aa-0000-0000-0000-1263.deploy.static.akamaitechnologies.com (2a02:26f0:12d:5aa::1263)) 56 data bytes
64 bytes from g2a02-26f0-012d-05aa-0000-0000-0000-1263.deploy.static.akamaitechnologies.com (2a02:26f0:12d:5aa::1263): icmp_seq=1 ttl=59 time=22.0 ms
64 bytes from g2a02-26f0-012d-05aa-0000-0000-0000-1263.deploy.static.akamaitechnologies.com (2a02:26f0:12d:5aa::1263): icmp_seq=2 ttl=59 time=22.4 ms
64 bytes from g2a02-26f0-012d-05aa-0000-0000-0000-1263.deploy.static.akamaitechnologies.com (2a02:26f0:12d:5aa::1263): icmp_seq=3 ttl=59 time=22.6 ms
64 bytes from g2a02-26f0-012d-05aa-0000-0000-0000-1263.deploy.static.akamaitechnologies.com (2a02:26f0:12d:5aa::1263): icmp_seq=4 ttl=59 time=22.4 ms
^C
--- repo.skype.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 22.049/22.364/22.628/0.206 ms

Why (has Skype or its Debian repository been discontinued?), who is the culprit, and what to do?