Hello,
1)
Fatal error: Uncaught Error: Using $this when not in object context in /home/freeman/public_html/wp-content/themes/royal-child/functions.php
We are not responsible for code that you added to your child theme, so check the code and fix the error.
2)
Fatal error: Uncaught Error: [] operator not supported for strings in /home/freeman/public_html/wp-content/plugins/revslider/includes/framework/base-admin.class.php:71
You used out of date version of Revolution slider. We have updated the plugin. Check if you still have this type of error.
Regards