> ## Documentation Index
> Fetch the complete documentation index at: https://rasa.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting

> Troubleshooting issues with your local environment.

### Python 3.10 requirements

*If you are using Linux*, installing `rasa-pro` could result in a failure while installing `tokenizers` and
`cryptography`.

In order to resolve it, you must follow these steps to install a Rust compiler:

```bash theme={null}
apt install rustc && apt install cargo
```

After initializing the Rust compiler, you should restart the console and check its installation:

```bash theme={null}
rustc --version
```

In case the PATH variable had not been automatically setup, run:

```bash theme={null}
export PATH="$HOME/.cargo/bin:$PATH"
```

*If you are using macOS*, note that installing `rasa-pro` could result in a failure
while installing `tokenizers` (issue described in depth [here](https://github.com/huggingface/tokenizers/issues/1050)).

In order to resolve it, you must follow these steps to install a Rust compiler:

```bash theme={null}
brew install rustup
rustup-init
```

After initializing the Rust compiler, you should restart the console and check its installation:

```bash theme={null}
rustc --version
```

In case the PATH variable had not been automatically setup, run:

```bash theme={null}
export PATH="$HOME/.cargo/bin:$PATH"
```

### OSError: \[Errno 40] Message too long

If you run `rasa train` or `rasa run` after you’ve enabled tracing using Jaeger as a backend in your local development environment,
you might come across this error `OSError: [Errno 40] Message too long`.

This could be caused by the OS of your local development environment restricting UDP packet size.
You can find out the current UDP packet size by running `sysctl net.inet.udp.maxdgram` on macOS.
You can increase UDP packet size by running `sudo sysctl -w net.inet.udp.maxdgram=65535`.


## Related topics

- [Rasa MCP Tools](/docs/pro/installation/rasa-mcp-tools.md)
- [Enterprise Search Policy](/docs/reference/config/policies/enterprise-search-policy.md)
- [Train Your Assistant](/docs/studio/test/train-your-assistant.md)
- [Local Setup for Custom Actions](/docs/studio/build/actions/local-testing.md)
- [Rasa Pro Analytics](/docs/reference/integrations/analytics.md)