Error CS0118

Getting error cs0118 namespace used like a type.

Also, when adding a reference to an indicator, the source is disappearing from the editor 

but the Build button is working.

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;

namespace Test40
{
    [Indicator(AccessRights = AccessRights.None)]
    public class Test40 : Indicator
    {
        [Parameter(DefaultValue = "Hello world!")]
        public string Message { get; set; }

        [Output("Main")]
        public IndicatorDataSeries Result { get; set; }

        public Test ind;
        
        protected override void Initialize()
        {
            // To learn more about cTrader Automate visit our Help Center:
            // https://help.ctrader.com/ctrader-automate

            ind = Indicators.GetIndicator<Test>();

            Print(Message);
        }

        public override void Calculate(int index)
        {
            // Calculate value at specified index
            // Result[index] = 
        }
    }
}

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;

namespace Test
{
    [Indicator(AccessRights = AccessRights.None)]
    public class Test : Indicator
    {
        [Parameter(DefaultValue = "Hello world!")]
        public string Message { get; set; }

        [Output("Main")]
        public IndicatorDataSeries Result { get; set; }

        protected override void Initialize()
        {
            // To learn more about cTrader Automate visit our Help Center:
            // https://help.ctrader.com/ctrader-automate

            Print(Message);
        }

        public override void Calculate(int index)
        {
            // Calculate value at specified index
            // Result[index] = 
        }
    }
}