This is probably the reason why local builds don’t work and local OBS instances (and eg. packman) can’t connect to build.opensuse.org.
https://build.opensuse.org/monitor
$ osc build ...
Server returned an error: HTTP Error 400: Bad Request
remote error: remote error connect Connection refused (http //back-other-opensuse 5252/build/openSUSE Tumbleweed/standard/x86_64/_repository?view=cache) (http://back-home-opensuse:5252/build/home:munix9:unstable/openSUSE_Tumbleweed/x86_64/gambas3/_buildinfo?add=gdb&add=vim&add=strace&add=less&add=rzsz)
https://pmbs.links2linux.de/package/show/Multimedia/kodi
The repository setup is broken, build or publish not possible