> ## Documentation index
> Fetch the complete documentation index at: https://arize.com/llms.txt
> Ask it with GET https://arize.com/ask?q=<keywords or question>. Short keywords rank best.
> Use these 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.