Connection id "0HLF65M4A0D4I", Request id "0HLF65M4A0D4I:0000000E": An unhandled exception was thrown by the application

I downloaded the ABP version 3.7.2 and ran it for the first time without adding any entity and it worked fine as expected. However, when I added some entities, It does not start! I checked the error log and noticed the error Connection id "0HLF65M4A0D4I", Request id "0HLF65M4A0D4I:0000000E": An unhandled exception was thrown by the application Below is the entity I added in the Bank.Core project. I created a new folder (Transactions) to match my entity name Transaction which contains foreign keys. See below.

using Abp.Domain.Entities;
using Abp.Domain.Entities.Auditing;
using Bank.Authorization.Users;
using System;
using System.ComponentModel.DataAnnotations.Schema;

namespace Bank.Transactions
{
    [Table("Tbl_Transactions")]
    public class Transaction : Entity<long>, IHasCreationTime
    {
        /// <summary>
        /// Maximum User's account number length
        /// </summary>
        public const int MaxAccountNumberLength = 10;

        public enum Currency
        {
            NGN = 566,
            USD = 840,
            EUR = 978
        }

        public DateTime CreationTime { get; set; }
        public Investment Investment { get; set; }
        public bool IsCompleted { get; set; }

        public Loan Loan { get; set; }
        public User User { get; set; }
    }
}

The Loan entity is as follows

using Abp.Domain.Entities;
using Abp.Domain.Entities.Auditing;
using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Bank.Transactions
{
    [Table("Tbl_Loans")]
    public class Loan : Entity<long>, IHasCreationTime
    {
        [StringLength(Transaction.MaxAccountNumberLength)]
        public string AccountNumber { get; set; }

        public decimal? Amount { get; set; }
        public DateTime CreationTime { get; set; }
        public DateTime? EffectiveDate { get; set; }
        public DateTime? InstallmentDate { get; set; }
        public decimal? InterestRate { get; set; }
        public decimal? ManagementFee { get; set; }
        public DateTime? MaturityDate { get; set; }
        public decimal? ProcessingFee { get; set; }
        public decimal? RepaymentAmount { get; set; }
        public int? Tenor { get; set; }
    }
}

And the Investment Entity as follows

using Abp.Domain.Entities;
using Abp.Domain.Entities.Auditing;
using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Bank.Transactions
{
    [Table("Tbl_Investments")]
    public class Investment : Entity<long>, IHasCreationTime

    {
        [StringLength(Transaction.MaxAccountNumberLength)]
        public string AccountNumber { get; set; }

        public decimal? Amount { get; set; }
        public DateTime CreationTime { get; set; }
        public Transaction.Currency? Currency { get; set; }
        public DateTime? EffectiveDate { get; set; }
        public decimal? ExpectedInterestAmount { get; set; }
        public decimal? InterestRate { get; set; }
        public decimal? MaturityAmount { get; set; }
        public DateTime? MaturityDate { get; set; }
        public int? Tenor { get; set; }
    }
}

And here is my Database Context class

using Abp.Zero.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using Bank.Authorization.Roles;
using Bank.Authorization.Users;
using Bank.MultiTenancy;

namespace Bank.EntityFrameworkCore
{
    public class BankDbContext : AbpZeroDbContext<Tenant, Role, User, BankDbContext>
    {
        /* Define a DbSet for each entity of the application */
        public DbSet<Transactions.Transaction> Transactions { get; set; }

        public BankDbContext(DbContextOptions<BankDbContext> options)
            : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.ChangeAbpTablePrefix<Tenant, Role, User>("Tbl_");
        }
    }
}

When I add migration and update my database, I get the error Connection id "0HLF65M4A0D4I", Request id "0HLF65M4A0D4I:0000000E": An unhandled exception was thrown by the application however the Angular project still works fine after runing the refresh.bat file. The error message is not very useful and I’ve done a lot of googling but couldn’t make any headway.

[ofuochi]

It worked after I commented out the line options.IndexStream = () => Assembly.GetExecutingAssembly().GetManifestResourceStream("Bank.Web.Host.wwwroot.swagger.ui.index.html") I’m assuming that Swagger automatically gets the Ui index.html file from wwwroot

[MarianoGomezBidondo]

I had the same problem, and it was because I changed the name of the XXX.Web.Host project. It was solved by changing where it says GetManifestResourceStream (“XXX.Web.Host.wwwroot.swagger.ui.index.html”) by GetManifestResourceStream (“YYY.Web.Host.wwwroot.swagger.ui.index.html”) where YYY is the new name of the project (YYY.Web.Host)