Error when upgrading Drupal

[gi...@shaw.ca]

Hi folks,

I am trying to upgrade Drupal to 10.5.6 and getting this error :

    Processed 500 items of 820.
    Failed: LogicException: The mapping definition at `islandora_iiif.settings` is invalid: its `use_relative_paths` key contains a NULL. It must be an array. in Drupal\Core\Config\Schema\Mapping->__construct() (line 35 of /var/www/html/drupal/web/core/lib/Drupal/Core/Config/Schema/Mapping.php).

This device is one of the original Islandora V2 installs...Islandora was still not a Drupal module.
Trying to find this particular line....but don't see it...Any suggestions would be appreciated.