I hope you are well today and thank you for your question.
I logged into your website and could edit it as shown in the attached screenshot.
You are using the outdated version of the PHP on your website as shown in the second attached screenshot so please update it to the latest version by contacting your web host.
Also, It seems you are using an older version of the theme on your website so please update it to the below latest version as described here https://support.shufflehound.com/updating-theme/
Please login to access this file
Please update the WPBakery page builder plugin from the below path after updating the theme.
Admin Area -> Appearance -> Install Plugins