Dell Command Update during TS not working

Hi, I work for an enterprise org and am trying to run DCU during and SCCM OSD task sequence to backfill updates. When I run during TS I get an unable to access catalog error for both driverInstall and applyUpdates, however this issue is not present immediately after TS. From what I can see online all you should have to do is install DCU and then you should be able to just run these commands through CLI. Im hoping that someone may be able to point out something Im missing or provide some insight for me.

I can provide smsts and dcu logs from the execution if it will be helpful in identifying the issue

Thanks for any responses, I know it's a niche one but hoping someone out there has run into the issue