Hello everyone, I'm trying to use Contentment DataPicker with my own data, I have this code:

 public class TestDataPickerSource : IDataPickerSource
    {

        public Dictionary<string, object> DefaultValues => default;

        public IEnumerable<ConfigurationField> Fields => default;

        public string Group => "SSO";

        public OverlaySize OverlaySize => OverlaySize.Small;

        public string Name => "Test";

        public string Description => "testing.";

        public string Icon => "icon-umb-users";

        public async Task<IEnumerable<DataListItem>> GetItemsAsync(Dictionary<string, object> config, IEnumerable<string> values)
        {
            var items = new List<DataListItem>();
            for (int i = 0; i < 10; i++)
            {
                items.Add(new DataListItem
                {
                    Name = "name " + i,
                    Description = "",
                    Value = (i + 1).ToString(),
                });
            }
            return items;
        }

        public async Task<PagedResult<DataListItem>> SearchAsync(Dictionary<string, object> config, int pageNumber = 1, int pageSize = 12, string query = "")
        {
            var items = new PagedResult<DataListItem>(1, pageNumber, pageSize);

            return await Task.FromResult(items);
        }
    }

when I select this as a data source it shows me this error and returns noting:

I followed the documentation, have I missed something?