> ## Documentation Index
> Fetch the complete documentation index at: https://motiadev-mintlify-e5ee0082.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshoot common iii engine and worker errors

> Fixes for common errors when running iii, including KVM access issues, worker connection failures, and sandbox microVM startup problems on Linux hosts.

Solutions to errors you may hit while running the iii engine and workers.

## `KVM not accessible`

Workers boot inside a microVM that needs read/write access to `/dev/kvm`. On Linux hosts where your
user is not in the `kvm` group (common on WSL2), starting a worker fails with `KVM not accessible`.

Add your user to the `kvm` group:

```bash theme={null}
sudo usermod -aG kvm $USER
```

Then restart your session so the new group membership applies. On WSL2, run `wsl --shutdown` from a
Windows terminal and reopen your distribution.

<Info>For why workers run in microVMs, see [Engine](./understanding-iii/engine).</Info>