server/src/Admin/Controllers/ErrorController.cs

using Microsoft.AspNetCore.Diagnostics;
using Microsoft.AspNetCore.Mvc;

namespace Bit.Admin.Controllers
{
    public class ErrorController : Controller
    {
        [Route("/error")]
        public IActionResult Error(int? statusCode = null)
        {
            var exceptionHandlerPathFeature = HttpContext.Features.Get<IExceptionHandlerPathFeature>();
            TempData["Error"] = HttpContext.Features.Get<IExceptionHandlerFeature>()?.Error.Message;

            if (exceptionHandlerPathFeature != null)
            {
                return Redirect(exceptionHandlerPathFeature.Path);
            }
            else
            {
                return Redirect("/Home");
            }
        }
    }
}