To set you back, please connect via ftp and make sure you have a default theme in the wp-content/themes/
Default themes include TwentyFourteen
Then change the name of the wp-content/themes/circleflip
“or any other name”
This will revert your WP back to a default theme, after accessing the WP again, please try activating the theme again, and if all fails please provide us with WP admin access and FTP access so that we could check it for you.