# Unknown error from alto bundler

`Unknown error from alto bundler` is a generic error from Pimlico's bundler that means it hit an internal failure, or that the underlying error contains details it can't return.

The bundler encountered an unexpected error. This is either an internal 500 error, or an error with sensitive information that can not returned.

## Possible solutions

* [Reach out to us](https://t.me/pimlicoHQ) if you see this error.