Hello Alston, most likely when you get 404 trying to log in after successfully loaded login page, you forgot to enable all .NET Framework 3.5 and .NET Framework 4.8 features in Windows Features window according to the installation manual:
Hello Alston, most likely when you get 404 trying to log in after successfully loaded login page, you forgot to enable all .NET Framework 3.5 and .NET Framework 4.8 features in Windows Features window according to the installation manual: