In addition, is this something I should fix or is it part of the theme support?
Site Health Status
The site health check shows critical information about your WordPress configuration and items that require your attention.
1 critical issue
Your site is set to display errors to site visitors
Security
Debug mode is often enabled to gather more details about an error or site failure, but may contain sensitive information which should not be available on a publicly available website.
The value, WP_DEBUG_DISPLAY, has either been enabled by WP_DEBUG or added to your configuration file. This will make errors display on the front end of your site.
Learn more about debugging in WordPress. (opens in a new tab)