Dell Display Manager 2.3.2.18 currently has vulnerabilities that are resolved by version 2.3.2.20.
v2.3.2.20 fails to install under the system account - a ticket has been raised with Dell, they have replicated it and said it will be fixed in the next release.
Issue seems to be resolved in today's update, if there are no issues found during testing this will be released in the catalog soon!
https://www.dell.com/support/home/en-us/drivers/driversdetails?driverid=906jv