hey guys, i get error 500 when i update from X to PRO
this is the error message i get when ive looked :
Fatal error: Cannot redeclare CS() (previously declared in /www/webvol8/3i/9akmcunf2nws2fv/till-it.nu/public_html/wp-content/plugins/cornerstone/includes/utility/helpers.php:8) in /www/webvol8/3i/9akmcunf2nws2fv/till-it.nu/public_html/wp-content/themes/pro/cornerstone/includes/cornerstone-plugin.php on line 120
Page is www.till-it-nu i have activated the old theme.
login is in secure note.