Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/jellyfin/src/commit/2c231e84e655a4e892f540827d064d4a7e24519b/Emby.Server.Implementations/Net
You should set ROOT_URL correctly, otherwise the web may not work correctly.
The underlying cause looks to be https://github.com/dotnet/runtime/issues/28630.
Basically, it's an access denied bug.
It looks like multicasts need the same access rights as broadcasts on some systems.