FromSql method is not working

[narslankaya]

We tried many samples. To see the problem use the fallowing code:

var data = context.Products.FromSql("select * from Product").FirstOrDefault();

The result is null reference exception:
at Microsoft.EntityFrameworkCore.Oracle.Query.Sql.Internal.OracleQuerySqlGenerator.GenerateProjection(Expression projection) at Microsoft.EntityFrameworkCore.Oracle.Query.Sql.Internal.OracleQuerySqlGenerator.ProcessExpressionList[T](IReadOnlyList`1 items, Action`1 itemAction, Action`1 joinAction) at Microsoft.EntityFrameworkCore.Oracle.Query.Sql.Internal.OracleQuerySqlGenerator.VisitSelect(SelectExpression selectExpression) at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node) at Remotion.Linq.Parsing.ThrowingExpressionVisitor.Visit(Expression expression) at Microsoft.EntityFrameworkCore.Query.Sql.DefaultQuerySqlGenerator.GenerateSql(IReadOnlyDictionary`2 parameterValues) at Microsoft.EntityFrameworkCore.Query.Internal.ShaperCommandContext.GetRelationalCommand(IReadOnlyDictionary`2 parameters) at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.BufferlessMoveNext(DbContext _, Boolean buffer) at Microsoft.EntityFrameworkCore.Oracle.Storage.Internal.OracleExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded) at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.MoveNext() at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found) at lambda_method(Closure ) at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ResultEnumerable`1.GetEnumerator() at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider._TrackEntities[TOut,TIn](IEnumerable`1 results, QueryContext queryContext, IList`1 entityTrackingInfos, IList`1 entityAccessors)+MoveNext() at Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.MoveNext() at System.Linq.Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Boolean& found) at System.Linq.Enumerable.First[TSource](IEnumerable`1 source) at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass15_1`1.<CompileQueryCore>b__0(QueryContext qc) at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)

We are using AspNetCore 2.2 and citms.entityframeworkcore.oracle 1.0.7