Network Storage Errors - "Network Storage not supported on this host"

I have been using Network Storage for backups on HA for some time, and due to some issues with backups I have just been digging around and found this under storage

It DEFINITELY was before - i’ve only ever set it up in the UI, so I don’t know if something has changed?

But in any case, due to the issues I’m seeing I want to disable the network storage I have set up (which still show in Backup etc)

With the UI in this state, how do I do that?