# Troubleshooting installation errors

## \[::]:3030 failed (97: Address family not supported by protocol...

When installing or starting the server, you might encounter an error related to Nginx, as shown below:

```plaintext
1#1: socket() [::]:3030 failed (97: Address family not supported by protocol)
socket() [::]:3030 failed (97: Address family not supported by protocol)
```

This error indicates a problem with Nginx attempting to open a socket on an IPv6 address, which might not be supported in your network configuration.

### Solution

1. Open UI Bakery `.env` ([Updating UI Bakery ENV variables guide](https://docs.uibakery.io/on-premise/install-and-update/updating-environment-variables))
2. Add or update the following line:

```sh
UI_BAKERY_LISTEN_IP6=false
```

3. Save the file and restart UI Bakery

```sh
docker compose down
docker compose up -d
```

## Escaping special characters

Sometimes when using special characters in your environment variables, like &, $, %, the variables may not be escaped properly. To fix it, put the variable value in quotes like this:

```bash
UI_BAKERY_SMTP_PASSWORD='myPasswordWithSpecicalChars$33%#4'
```

{% hint style="info" %}
If you have an older version of Docker installed, you may need to use **double quotes** instead.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.uibakery.io/on-premise/install-and-update/troubleshooting.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.