Hi All,

I am trying to use Umbraco 8 Composing to run code at startup, but the boot is failing with this error and breaking at line 223 of CoreRuntime.cs

Exception thrown: 'Umbraco.Core.Exceptions.BootFailedException' in Umbraco.Core.dll
Exception thrown: 'Umbraco.Core.Exceptions.BootFailedException' in Umbraco.Core.dll

Here is my Composing code which is based on the example HERE . Without this code, Umbraco Starts OK. So this code is causing the Boot Failure. Any assistance resolving this would be much appreciated:

using System.Linq;
using Umbraco.Core;
using Umbraco.Core.Composing;
using Umbraco.Core.Events;
using Umbraco.Core.Services;
using Umbraco.Core.Services.Implement;

namespace TeraTastic.TT_Classes
{
    //  Clancy: Added following line 8/26/2020 as suggested at https://codeshare.co.uk/blog/how-to-fix-the-umbraco-core-exceptions-bootfailedexception/
    // [RuntimeLevel(MinLevel = RuntimeLevel.Run)]
    public class TT_Startup_Composer : IUserComposer
    {
        public void Compose(Composition composition)
        {
            // Append our component to the collection of Components
            // It will be the last one to be run
            composition.Components().Append<TT_Startup_Component>();
        }
    }

    public class TT_Startup_Component : IComponent
    {
        // Initialize: It will run once when Umbraco starts
        public void Initialize()
        {
            int i = 0;
            i++;
            i++;
            ////Listen for when content is being saved
            //var myTT_Startup = new TT_Startup();
            //// myTT_Startup.Startup(umbracoApplication, applicationContext);
            //myTT_Startup.Startup();
        }

        public void Terminate()
        { }
    }
}

Thanks Terry Clancy ClanceZ