Solutions to errors you may hit while running the iii engine and workers.
Scanned 9/3/2026
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# Troubleshooting
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
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>
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