When attempting to adjust the permissions on any USB Port Security element it returns a "Business logic error: Object reference not set to an instance of an object" error and cannot get back into the element, the page needs to be reloaded.
This Issue was reported as DAMS-3298 and is fixed in version 10.2.0.230. The latest version of Desktop Authority can be downloaded from our support portal download page.
A list of “Resolved Issues” is published in the product Release Notes accompanying new releases that can be referenced to identify if a fix has been implemented. Product Release Notes are available in the “Release notes and guides” area of our Support Portal.