Homepage not working

Check is there any htaccess on root ?

On the root of your website ,there may be a chance of htaccess where your folders wp-content,wp-includes are stored. Check there.

Try:
– switching to the Twenty Eleven theme by renaming your current theme’s folder inside wp-content/themes and adding “-old” to the end of the folder name using FTP or whatever file management application your host provides.

– resetting the plugins folder by FTP or phpMyAdmin.