'Could not deserialize the response body stream as services.base.detailsdto' in blazor app when call API

JsonSerializationException: Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'DTO' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.
To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array.
Path '', line 1, position 1.

//var patientDiagnosis = await _context.PatientDiagnosis.FirstOrDefaultAsync(e=>e.Pid==Pid);
 var patientDiagnosis = await _context.PatientDiagnosis.Where(e => e.Pid == Pid).ToListAsync();
                
                if (patientDiagnosis == null)
                {
                    logger.LogWarning($"Record Not Found:{nameof(GetPatientDiagnosis)}-ID:{Pid}");
                    return NotFound();
                }
                return Ok(patientDiagnosis);

await _context.PatientDiagnosis.Where(e => e.Pid == Pid).ToListAsync();