Enable your ServiceNow instances to accept Quality Clouds scans performed via REST API calls by allowing your sys_package table to accept web services. The access has to be granted after each ServiceNow upgrade as it resets the setting.
For ServiceNow instances with SSO system:
Make sure that the admin user to be launching scans in Quality Clouds uses local authenticaion and is able to use the REST API.
For instances with IP restrictions, make sure you add an exception for the following IP address:
Optionally, to enable data on performance (e.g. slow client transactions), enable the ServiceNow
Client Transactions Timings plugin which enhances the system logs. For more information, check the ServiceNow documentation article.