Extended Error Reporting was a great mod that helped players identify errors in their Cities Skylines game. However, since it has been abandoned, it is no longer functional. While NullReferenceCatcher is a great tool that can help you catch NullReferenceExceptions in real-time, it's important to note that it's not the same as Extended Error Reporting. NullReferenceCatcher is actively maintained and updated, and it's a fantastic alternative that you can use. You can find the mod here: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2952968348. Give it a try and see if it works for you. If you have any issues or questions, feel free to ask!