Dears, I just bought this template
after install process with demo files etc. and without any error messages during install process
I wanted to enter to front end and then first error message came up..

Fatal error: Class 'St' not found in html/templates/simple/features/logo.php on line 67

even I disable in the backend the logo - put on "none"
coming up another error...

html/templates/simple/core/classes/menu.php on line 60

thanks for quick help