Omniverse application is not able to open assets in nucleus. Reproducible from isaac and composer applications on localhost and remote nucleus instances.
remote server can be added and browsed from local nucleus but not apps are not able to open it.
This is the error reported from Issac:
2024-09-06 18:09:35 [213,165ms] [Warning] [omni.kit.widget.filebrowser.thumbnails] Failed to stat url omniverse:
server omniverse://localhost: ConnectionStatus.CONNECTING
2024-09-06 18:09:44 [222,462ms] [Warning] [omni.client.plugin] Tick: provider_nucleus: Auth: Returned error: 4 (Denied)
server omniverse://localhost: ConnectionStatus.AUTH_FAILED
Ok so it is telling you that you need to close everything, all apps, Launcher, Nucleus and make sure you are fully, freshly logged in to both Launcher and Nucleus. Make sure you can get in to Nucleus in the Launcher and then start USD Composer and try again there. If you have to, delete the shortcut to your localhost in Composer and re-add it.
What assets are you referring to ? Example files or your own work ? I would personally not use Nucleus Localhost for your personal work, and store those usd files in normal windows.