AMPPS
Jamroom Hosting
Your permissions are wrong.
Make sure you FTP the files up individually as the USER on your server.This will create the right permissions for each file.
DO NOT upload the zip package and extract it as it will use permissions of for eg. NOBODY
So Unzip the files on your computer then log in via filezilla etc (FTP) as the user of that folder/site and upload them that way.
Then run the install from your browser.