OK I feel really dumb, but I got really fed up with this error and just edited the code myself. The two offending files’ USTRUCT constructors:
FMODSettings.h’s FFMODProjectLocale USTRUCT constructor line 209:
bDefault=false;
and
FMODBankLookup.h’s FFMODLocalizedBankTable USTRUCT constructor line 22:
Banks=nullptr;
My game packages fine now. Should have done this ages ago; what a waste of time lol! Really annoying that I didn’t haha.
I haven’t verified if sound etc is working but at least those errors don’t totally block my packaging.
EDIT: Yeah game works fine.