Error 11 is a network error that occurs when the Lingo optimization software is unable to connect to the server. This can be caused by a variety of issues, including a poor internet connection, a firewall blocking the connection, or a server issue. To resolve this issue, try the following steps:
1. Check your internet connection and make sure it is stable and reliable.
2. Check your firewall settings and make sure that Lingo is allowed to connect to the server.
3. Contact your network administrator to make sure that the server is running properly.
4. If the issue persists, contact Lingo support for further assistance.