InvalidArgumentException: The configuration property miniorange_auth_client_access_token_status.error doesn't exist.

When trying to test my SSO (https://testsite.org/subdir/testSSO), I am getting the error:

InvalidArgumentException: The configuration property miniorange_auth_client_access_token_status.error doesn't exist. in Drupal\Core\Config\Schema\ArrayElement->get() (line 76 of /home/USER/public_html/subdir/core/lib/Drupal/Core/Config/Schema/ArrayElement.php).

Steps to Reproduce

1. A Fresh Install of Drupal
2. Set up a Office 360 account according to: https://www.drupal.org/docs/contributed-modules/drupal-oauth-oidc-login/... →
3. Click "Test SSO"