Could not find the computed index field type: BXA.XA.Foundation.Custom.Search.AggregatedContent, BXA.XA.Foundation.Custom.Search [closed]

I am trying to add links and extending the implementation of the GetLayoutReferences method from Sitecore.XA.Foundation.Search.ComputedFields.AggregatedContent class. However I am getting the following error:

Could not find the computed index field type: BXS.XA.Foundation.Custom.Search.AggregatedContent, BXS.XA.Foundation.Custom.Search 

Here is my class code:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using Sitecore.Data.Fields;using Sitecore.Data.Items;using Sitecore.Layouts;using Sitecore.Text;namespace BXS.XA.Foundation.Custom.Search{    public class AggregatedContent : Sitecore.XA.Foundation.Search.ComputedFields.AggregatedContent    {        protected override IEnumerable<Item> GetLayoutReferences(Item item, ISet<Item> dataFolders)        {            LayoutField layoutField = new LayoutField(item);            using (new ContextItemSwitcher(item))            {                DeviceItem[] all = item.Database.Resources.Devices.GetAll();                foreach (DeviceItem device in all)                {                    IEnumerable<RenderingReference> references = layoutField.GetReferences(device);                    foreach (RenderingReference item3 in references ?? Enumerable.Empty<RenderingReference>())                    {                        string[] items = new ListString(item3.Settings.DataSource ?? string.Empty).Items;                        foreach (string path in items)                        {                            Item item2 = item.Database.GetItem(path, item.Language, Sitecore.Data.Version.Latest);                            if (item2 != null && IsDataItem(item2, dataFolders))                            {                                // custom - start                                if (item2.TemplateName == "Link List")                                {                                    foreach (Item linkItem in item2.Children)                                    {                                        var field = (LinkField)linkItem.Fields["Link"];                                        if (field.IsInternal)                                        {                                            yield return field.TargetItem;                                        }                                    }                                }                                // custom - end                                yield return item2;                            }                        }                    }                }            }        }    }}

And here is my config file:

<?xml version="1.0" encoding="utf-8" ?><configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:role="http://www.sitecore.net/xmlconfig/role/" xmlns:search="http://www.sitecore.net/xmlconfig/search/"><sitecore><contentSearch search:require="solr"><indexConfigurations><defaultSolrIndexConfiguration><documentOptions><fields hint="raw:AddComputedIndexField"><field fieldName="sxacontent"><patch:delete /></field><field fieldName="sxacontent" returnType="textCollection" type="BXS.XA.Foundation.Custom.Search.AggregatedContent, BXS.XA.Foundation.Custom.Search"><mediaIndexing ref="contentSearch/indexConfigurations/defaultSolrIndexConfiguration/mediaIndexing"/></field></fields></documentOptions></defaultSolrIndexConfiguration></indexConfigurations></contentSearch></sitecore></configuration>