I have searched and did research to solve my problem but I could not.
I am working on laravel 5.1 .
I have working project Working project on server and I just copied it in server.
Now, previous project is working fine but newly copied project login isn't working.
I have checked the file permission in project and I have assigned access right to needed file as per my knowledge .
I did composer update.
I googled it hard but couldn't solved it .