> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 08.07.2025: Improved Error Handling in Prompt Playground

> Available in Phoenix 11.20+

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  ![](https://storage.googleapis.com/arize-phoenix-assets/assets/images/phoenix-docs-images/playground_error_handling.png)
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Prompt Playground experiments now provide clearer error messages, listing valid options when an input is invalid. This makes troubleshooting easier and helps users quickly correct mistakes during experiment setup.

<Card title="feat(ui): playground error message lists valid options by rickarize · Pull Request #8959 · Arize-ai/phoenix" icon="github" href="https://github.com/Arize-ai/phoenix/pull/8959" horizontal>
  GitHub
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