Order By Date Time breaks in LINQ query

The following details the error I am getting The Student Class

public class Student () {
    public int Id {get;set;}
    public Student(int id IEnumerable<StudentOwner> owner) {
         _owners = owners != null ? owners.ToList() : new List<StudentOwner>();
    }
    private List<StudentOwner> _owners;
}

The StudentDetailsClass

public class StudentDetails () {
    pubiic int Id {get; set;}
    public DateTime UpdateDate { get; }
    public string Comments { get; set; }
    public int StudentRef {get; set; }

}

A selection of the offending code for the query is as follows, it works if you order by s.ID

  baseQuery = baseQuery.Where(
              o => s.StudentDetails
                   .OrderByDescending(s => **s.UpdateDate**).First().StudentRef
                == StudentSearchParams.StudentRef;

The following error occurs, yet if you do order by Id it works but that does not produce the required result. Any ideas ???

 .OrderByDescending(s1 => s1.UpdateDate)' could not be translated. 
 Additional information: Translation of member 'UpdateDate' on entity type 'StudentDetails' failed. 
 This commonly occurs when the specified member is unmapped. Either rewrite the query in a form 
 that can be translated, or switch to client evaluation explicitly by inserting a call to 
 'AsEnumerable', 'AsAsyncEnumerable', 'ToList', or 'ToListAsync'. See https://go.microsoft.com/fwlink/?linkid=2101038 for more information.