Failed To Update on Zorin OS 17.3 Pro

[Forpli]

Take a look in this thread. There are some solutions from the zorin group that you could try.

Secure Boot dbx Failed to build error issue

Original issue resolved I'll report back re. stability in a few days

The last one is 12h ago (scroll nearly to the end):

Secure Boot dbx Failed to build error issue

After spending some time researching this issue further, we've identified and created a potential solution for it with the standard fwupd package (APT). However, it would need to be tested more thoroughly to ensure that it fully resolves the issue and doesn't introduce any regressions that would affect the stability of the system in general. How to test the solution If you're still experiencing this issue – even after following the steps I mentioned in this post – and you're happy to test pre-p…