Process the exception of the bot being blocked

```
base.py             :66              decorator() 	 Error while sending Telegram message: b'{"ok":false,"error_code":403,"description":"Forbidden: bot was blocked by the user"}' 
broker.py           :46               callback() 	 Broker callback error 
broker.py           :47               callback() 	 'bool' object is not subscriptable 
```