6.7.0 ELK Connectivity using ODBC

I am trying to connect to Elastic 6.7.0 Index using Dot Net ODBC driver and getting below exception
Need help on likely cause of this exception.

System.Data.Odbc.OdbcException (0x80131937): ERROR [HY000] [Elastic][EsODBC 6.7.0(1b41af1+,u,r) Driver]verification_exception: Found 1 problem(s)
line 1:24: Unknown index

@Baksh, was there more to that error message that maybe got left out from the copy&paste?
In any case, as the error hints, the executed query seems to refer to an index ("table") that does not exist.