Site Set to Display Errors

The site is showing two errors, publicly for all visitors to see. I am unsure how to fix the error as I have just taken this client’s account on from a former coworker and have no experience with wordpress so I need step-by-step assistance/instructions. The errors are pasted below for reference.

Notice: WP_Scripts::localize was called incorrectly. The $l10n parameter must be an array. To pass arbitrary data to scripts, use the wp_add_inline_script() function instead. Please see Debugging in WordPress for more information. (This message was added in version 5.7.0.) in /home/chakim20/ddinterventions.org/wp-includes/functions.php on line 5313

Notice: WP_Scripts::localize was called incorrectly. The $l10n parameter must be an array. To pass arbitrary data to scripts, use the wp_add_inline_script() function instead. Please see Debugging in WordPress for more information. (This message was added in version 5.7.0.) in /home/chakim20/ddinterventions.org/wp-includes/functions.php on line 5313

The page I need help with: [log in to see the link]