This happened just now, I reloaded a save file and now I can't use ANY item. I completely closed the game, restarted it, loaded and it got fixed. easy to fix but I though I'd let you know
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