A command failed because of the sandbox. What can I do?
On the Frely connections page you can open more for a connection: credential folders to read, extra folders to write, or a time-limited run without the sandbox. On Windows, or on Linux without bubblewrap, socat and ripgrep, commands are refused because the computer cannot sandbox; install those tools on Linux. FRELY_SANDBOX=off turns the sandbox off on the device only; use it only when you accept the risk.