In previous years when S-89 conversions were not working so well within TB, it sometimes helped to do the pdf>jpg conversion externally. There are various programmes or even sites where this can be done for free.
Choose at least 300dpi converson. Make sure to rename the jpg to the original file name of the pdf if necessary, or else TB won’t recognise it. Of course the jpg should be manually moved to where you have your S-89s.
@Cuozzo FYI if I download the Italian ones, they do work. Can you double check you have the 11/23 version? (Even if it is it wouldn’t be the first time the versions of one language differ between branches…)