Error FFFFFFF due to shop_items.ymt from jmrp

I used to have jmrp with a bunch of other mods before I uninstalled the game for a short bit. Later I reinstalled the game with the plan to start playing with my mods again. I reinstalled my mods and I realized I kept getting error fffffff, so I narrowed it down to the shop_items.ymt file from jmrp. If I delete it everything works fine but if I don't I get the error. The error occurs while loading up the story. Jmrp is the only mod I have enabled at the moment and I would appreciate any help I could get to fixing the issue since this seems to be a very rare issue because I can find anybody else with the same issue