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

# Common issues

> Most common issues and their solutions

## Application shows 'no user is set' error in local development environment

User data requires an application to be inside Telegram environment to be fetched. When debugging locally in a browser user data is naturally not available. You don't need to do anything, the app will just work as intended when launched as a Telegram Mini App, so **you can just disregard this error**.

## Events are not sent with BLOCKED\_BY\_CLIENT error

In a local development environment your browser extensions such as Adblock can interfere with the SDK. In this case you should disable Adblock-like extensions in your browser. Either way, Telegram Mini Apps do not support extensions, so **your production app will not be affected**.

## How to debug Telegram Mini App live

This is really easy to debug your app inside Telegram in case something is wrong in production. You can find the official instruction [here](https://docs.ton.org/develop/dapps/telegram-apps/testing-apps).