Hello,
You need to install Redux and CMB2 (Metaboxes framework) plugins also.
http://prntscr.com/q4ndax Please install them as was mentioned in the previous reply.
https://www.8theme.com/demo/docs/royal/Plugins/Included_Plugins
http://prntscr.com/q4ndfj https://themeforest.net/item/royal-multipurpose-wordpress-theme/8611976
Regards