I see…
Please, create an interrogator log with the -AB package and see how it goes.
You can find information about how manually doing this in this link Tutorial: APIM Interrogator Utility/Create Interrogator Log that you previously found.
Can you attach the xml file that you already have?.
If I’m understanding correctly, that’s expected. There’s always a +1 file for the log of the USB creation. Post a screenshot if you have one.