The problem is caused by missing of required plugins – http://prntscr.com/q4ju4m Go to Appearance > Install plugins or install plugins manually (latest versions you can download from here – https://www.8theme.com/downloads/ )
Let us know the result.
It is recommended to create a backup of your files and database before starting any updates – https://www.8theme.com/demo/docs/royal/Theme_Update.html to be able to restore the site to the previous state if something goes wrong. Or you can create a staging site (full copy of the existing one) and do updates of the theme and plugins there first. If everything is ok then you’ll be able to update the production site.
