Error when connecting to POSTGRESQL on localhost

I am trying to connect to local postgresql db and unable to connect, keep getting the error in attached png. Any suggestion?
Thanks,
Salil
Comments
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            I am using LINQ Pad v6.10.2 X64 Beta Update Stream. 
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            The PostgreSQL driver uses Npgsql's EF Core scaffolder, which appears to have some bugs. You could log the issue here: 
 https://github.com/npgsql/npgsql/issuesor else try the new LINQ-to-DB driver which is now available for LINQPad 6. Click Add Connection and then View more drivers. 
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            Thanks Joe, the new LINQ-to-DB driver worked. 

