(from zypper)
Retrieving repository 'repo-oss-source' metadata ...............................................................[error]
Repository 'repo-oss-source' is invalid.
[openSUSE:repo-oss-source|http://cdn.opensuse.org/source/tumbleweed//repo/oss] Valid metadata not found at specified URL
History:

• Location 'http://cdn.opensuse.org/source/tumbleweed/repo/oss/repodata/4ad23d6099bb3e5659073b4ce7e395aa2295d09f818708221400c5788a80daad-appdata.xml.gz' is temporarily unaccessible.
• Can't provide ./repodata/4ad23d6099bb3e5659073b4ce7e395aa2295d09f818708221400c5788a80daad-appdata.xml.gz

wget 'http://cdn.opensuse.org/source/tumbleweed/repo/oss/repodata/4ad23d6099bb3e5659073b4ce7e395aa2295d09f818708221400c5788a80daad-appdata.xml.gz'¶

--2023-10-26 13:12:17-- http://cdn.opensuse.org/source/tumbleweed/repo/oss/repodata/4ad23d6099bb3e5659073b4ce7e395aa2295d09f818708221400c5788a80daad-appdata.xml.gz
Resolving cdn.opensuse.org (cdn.opensuse.org)... 2a04:4e42:52::347, 199.232.73.91
Connecting to cdn.opensuse.org (cdn.opensuse.org)|2a04:4e42:52::347|:80... connected.
HTTP request sent, awaiting response... 503 Backend is unhealthy
2023-10-26 13:12:17 ERROR 503: Backend is unhealthy.

Problem persists from different ISPs or using IPv4 vs IPv6.

Jared H.