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

# Troubleshooting

This is a list of common pitfalls on using Payum, and how to avoid them.

### RequestNotSupported exception is thrown.

The exception is thrown when a gateway is not able to find an action for given request. All actions' `supports` method returns false. There are several reasons for that:

TODO

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### Supporting Payum

Payum is an MIT-licensed open source project with its ongoing development made possible entirely by the support of community and our customers. If you'd like to join them, please consider:

* [Become a sponsor](https://github.com/sponsors/Payum)