Exposing service to portal users

Hello all,

I am trying to enable access for a portal user to trigger a service within Creatio. I'm following the steps as listed in this academy page but when I try to declare _baseService and publish, I receive an error saying that GlbInterviewService is "'GlbInterviewService' is a namespace but is used like a type"

namespace Terrasoft.Configuration.KeenGlbInterviewService
{
	using System;
	using System.IO;
	using System.Collections.Specialized;
	using System.Globalization;
	using System.Runtime;
	using System.Runtime.Serialization;
	using System.ServiceModel;
	using System.ServiceModel.Web;
	using System.ServiceModel.Activation;
	using System.Threading;
	using System.Threading.Tasks;
	using System.Web;
	using Terrasoft.Core;
	using Terrasoft.Core.Factories;
	using Terrasoft.Web.Common;
    using Terrasoft.Web.Common.ServiceRouting;
 
	#region Class: KeenGlbInterviewService
 
	[DefaultServiceRoute, SspServiceRoute]
	[ServiceContract]
	[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
	public class KeenGlbInterviewService : BaseService
	{
 
		#region Methods: Public
		private static readonly GlbInterviewService _baseService = new GlbInterviewService();
 
		[OperationContract]
		[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
		public InterviewServiceResponse Start(InterviewServiceRequest request)
		{
			return _baseService.Start(request); 
		}
 
		[OperationContract]
		[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
		public InterviewServiceResponse Complete(InterviewServiceRequest request)
		{
			return _baseService.Complete(request);
		}
 
		#endregion
 
	}
 
	#endregion
 
	#region DataContract
 
	[DataContract]
	public class InterviewServiceResponse : ConfigurationServiceResponse
	{
		[DataMember(Name = "isSuccess")]
		public bool IsSuccess {get; set;}
	}
 
	[DataContract]
	public class InterviewServiceRequest
	{
		[DataMember(Name = "interviewId")]
		public Guid InterviewId { get; set; }
	}
 
	#endregion
 
}

From what I can tell I've set everything up exactly as the article says but I still receive the error. Though they declare _baseService the same way. Any suggestions as to what I could be doing wrong?