PrintDraft error

Question

When I run PrintDraft, I immediately get an error about “Marker errors detected” even when running the actual Run Basic Checks–>Markers tool gives me no errors.

When I look at the PrintDraft log, I see that there is a TeX error being caused by the \Smallcaps command inside of usfm.sty. Looking in usfm.sty (I have version 2.503) I see that command comes under “\Marker sc”.

This seems odd to me. Surely if there were a clash between usfm.sty and the PrintDraft macros, other people would have already reported it.

Deleting the entire “\Marker sc” section of the usfm.sty file (yes, I know you’re not supposed to edit it), results in the PrintDraft still failing, but with a log saying:
! Undefined control sequence.
\s@tupsizes …advance \colwidth by -\columnshift
                                \hsize =\textwidth \advanc…
‌
@netimesetup -> \s@tupsizes
                                \defineheads @ddcvhooks @ddspecialhooks \the …
‌
\ptxfile #1-> @netimesetup
                                \gdef \ch@plabel {} \initp@rastyles \initn@testy…
l.87 …rojects/XXX/PrintDraft/41MATXXX-draft.SFM}

I have uninstalled PT8 (and deleted its folder from the Program Files (x86) folder) and reinstalled, but that has not solved things.
I have tried running PrintDraft on different projects with no change in behaviour, so this seems to be a PT8 an error in my PT8 setup and not in a particular project.