The operation could not be completed. The parameter is incorrect

I'm getting "The operation could not be completed. The parameter is incorrect" when I build the solution. I tried deleting the .suo file as suggested in another thread

but that didn't work.

Can anyone help? Thanks.

+++++++++++++++++++++++++++++ IService1.cs ++++++++++++++++++++++

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace WcfService2
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
[ServiceContract]
public interface IService1
{

[OperationContract]
[WebInvoke(Method = "GET", UriTemplate = "/SayHello/{Name}", BodyStyle = WebMessageBodyStyle.Wrapped, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
string SayHello(string Name);
}
}

+++++++++++++++++++++++++++++++++++ Service1.svc.cs ++++++++++++++++++++++++++++++++++++++++++

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace WcfService2
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
// NOTE: In order to launch WCF Test Client for testing this service, please select Service1.svc or Service1.svc.cs at the Solution Explorer and start debugging.
public class Service1 : IService1
{
public string SayHello(string name)
{
return string.Format("Hello, {0}", name);
}
}
}

+++++++++++++++++++++++++++++++ web.config +++++++++++++++++++++++++++++++++++++++++++++++++++

<?xml version="1.0"?>
<configuration>

<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true"/>
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.6"/>
<httpRuntime targetFramework="4.6"/>
<!--<httpModules>
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"/>
</httpModules>-->
</system.web>
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp helpEnabled="true" />
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehavior">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<services>
<service name="WcfService2.Service1" behaviorConfiguration="ServiceBehavior">

<endpoint binding="webHttpBinding" contract="WcfService2.IService1" behaviorConfiguration="web">

</endpoint>
</service>

</services>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
</system.serviceModel>
<!--<protocolMapping>
<add binding="basicHttpsBinding" scheme="https"/>
</protocolMapping>-->
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
<!--<remove name="ApplicationInsightsWebTracking"/>
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"
preCondition="managedHandler"/>
</modules>
-->
<!--
To browse web app root directory during debugging, set the value below to true.
Set to false before deployment to avoid disclosing web app folder information.
-->
<!--
<directoryBrowse enabled="true"/>
<validation validateIntegratedModeConfiguration="false"/>-->

</configuration>