Missing reference to custom indicators

Hey,

I try to debug my cBot in Visual Studio 2022.

Unfortunatly, VS 2022 shows "Type or namespace TSV not found". TSV is a custom indicator. 

Same problem with all other Custom indicators, I tried.

in cTrader, i can save, compile and run the cBot. I also added the reference to the custom indicators in cTrader. That works. But in VS2022 it shows errors. 

Because of that, Iam unable to build the project and debug it. 

Is there any help for that? Thank you very much.

Here is a little test project which only uses a TSV indicator. In cTrader it works. In VS2022 it shows the missing reference error

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using cAlgo.API;
using cAlgo.API.Collections;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;

using cAlgo.Indicators;
namespace cAlgo.Robots
{
    [Robot(AccessRights = AccessRights.None)]
    public class NewcBot : Robot
    {
        TSV tsv;
        [Parameter(DefaultValue = "Hello world!")]
        public string Message { get; set; }

        protected override void OnStart()
        {
          
        }
    }
}