Oh! Thanks for letting me know! It's weird I didn't find out about this earlier!
well, I've had 4 playthroughs so far, I've reloaded a lot of times, only once this happened. All items had the "use" option grayed out and I could only discard. I'm SO glad it got fixed when I restarted the game because I was about to fight the secret bosses too xD I dunno why the Rake weapon error happened though. I also don't know if it only happens for the occultist