找不到对象！ codeigniter项目中的错误404

I have seen similar questions asked by other users but none has worked for me. I have a CodeIgniter project which runs perfectly fine in my localhost. I created virtual hosts so that I can host many projects. I do get the first page (login page) of the site but when logging into the system I get the error shown below instead of the next valid page.I have seen similar questions asked by other us