Thank you for your response. Those 2 files are back to read write file now.
I pasted that in my browser and that site can't be reached. I don't know where the 127.0.0.1 came from. it should be localhost.
site name: registration_tutorial
local site folder:/Applications/MAMP/htdocs/registration_tutorial
Server name: Testing Server
Connect using: Local/Network
Web URL: http://localhost/registration_tutorial/
I don't know what's causing this problem. Please help. Thank you