> For the complete documentation index, see [llms.txt](https://docs.nighty.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nighty.one/troubleshooting/unable-to-launch.md).

# Unable to launch

## Error: Unhandled exception in script

Failed to execute script 'Nighty' due to unhandled exception: (...)

If you encounter this error, please follow the [common solutions guide](/troubleshooting/common-solutions-to-all-issues.md).

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