Please help. Can't open Customize

Just installed the new theme and made it active. The website opens with the theme fine, but when I go to Customize to edit things I can’t. It just says
"Fatal error: Class ‘Llorix_One_Lite_General_Repeater’ not found in /home/dream/public_html/wp-content/plugins/llorix-one-companion/inc/settings.php on line 65"

Llorix One Lite was the theme I used before I found this one. I delete it hoping it would help but it didn’t.

I’m guessing you should disable the llorix-one-companion plugin. It seems that it depends on the Llorix theme to be active.