Unidac + Firebird: error if unicode is used in SQL query

Unidac + Firebird: error if unicode is used in SQL query

With UniDac 9.4 (demo), Delphi 11 and Firebird 4
If I use some characters in a query I get a
Dynamic SQL Error
SQL error code = -206
Attached a "working" example!
It's my fault or a bug?
Thanks
        Nicola