If a property or column name contains a reserved keyword, the parsing of the query will fail although the property name is surrounded by parenthesis and it is not in a place where a "group by" state

Example:

from myTable where ((group=' ' and label='FX') or (group=' ' and label='Sales'))

adding an alias to the class name will work.
Example:

from myTable as A where ((A.group=' ' and A.label='FX') or (A.group=' ' and A.label='Sales'))