I had trouble installing OpenShell on DGX Spark. It failed, possibly because I previously installed NemoClaw which installed a previous OpenShell.
First, OpenShell 0.0.76 failed to update a binary from a previous version, OpenShell 0.0.6 at /usr/local/bin/openshell .
I had to delete it.
Second, a newly created sandbox could not communicate with the gateway because the firewall was blocking.
I had to run sudo ufw allow 17670/tcp .