An error message is observed when trying to create a new order guide
The business rule 'Validate Portal Settings' script is conditions are failing
As mentioned earlier the error messages that you have seen on the page are thrown because of an OOB business rule: 'Validate Portal Settings' => https://<instance_name>.service-now.com/sys_script.do?sys_id=df5768c1871023000f220cf888cb0b22 and it aborts the insert transaction
This business rule is triggered on every insert or update on the order guide table. Some condition inside the business rule is failing and creating the issue.
In this case, the dictionary entry of the field "no_attachment_v2" under "sc_cat_item" table is set to True by default which is causing the business rule script conditions to fail and creating the error.
Removing the default value of the "no_attachment_v2" field and will create the order guide without any error.