> For the complete documentation index, see [llms.txt](https://support.tiger.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.tiger.com/english/frequently-asked-questions/error-connection-lost-when-launching-the-terminal.md).
# Error "Connection lost" when launching the terminal
If you encounter the "Connection Lost" error, try the following steps:
1. Log in using your license credentials. Use the login and password associated with your specific license, available in your[ Personal Account](https://www.tiger.com/terminal/personal-licenses):
Copy buttons are located next to the login and password fields for convenience:
2. Manually select a connection server: for a crypto license, choose one of the Crypto servers. For Full, Trial, or Player licenses, select one of the Main servers:
{% hint style="info" %}
Servers with the same name offer identical functionality. If you experience issues with one server, try an alternative.
{% endhint %}
3. Temporarily disable software that may block or filter outgoing traffic. This includes firewalls or antivirus programs.
4. Adjust DNS settings according to [our instructions](/english/frequently-asked-questions/fixing-network-issues-how-to-adjust-dns-settings.md).
5. Connect via a different network: for example, try using your mobile phone as a hotspot.
### How to Update DNS in the Configuration File
If the issue persists, please try replacing the DNS domains with the server IP addresses in the configuration file as per the instructions below:
1. In Windows Explorer, navigate to: **C:\Program Files (x86)\TigerTrade**
2. Find the **TigerTrade.exe.config** file and **move it to the desktop**, confirming the action with administrator permissions.
3. Right-click the file and select Open with - Notepad
4. In Notepad, replace the text between the `` tags with the following:
```
```
5. Save the changes and close the Notepad
6. Move the modified file back from the desktop to **C:\Program Files (x86)\TigerTrade**, confirming the action with administrator permissions.
Should you need any assistance, don't hesitate to contact our support team at **.**
---
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