Error: The "config.server" property is required and must be of type string.

I have set up a self-hosted proxy for the Microsoft SQL Server and in the notebook, I get the error `Error: The "config.server" property is required and must be of type string.`

```
My mssql url = "mssql://sa:aPassword@192.168.***.**:1433/aDatabase"
OS = "Windows 10"
```

How Can I fix it?