Thanks for using our theme.
Try to disable all the third-party plugins, that do not come bundled with our theme https://www.8theme.com/demo/docs/royal/Plugins/Included_Plugins , and check how it works then.
If the problem is independent of plugins, provide temporary wp-admin access, so we can take a closer look. Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it. Delete this account once all questions will be solved.
