hey, sorry to hear!! i know my gf had the same problem and she wrote a solution she found in her guide:

troubleshooting:  if it suddenly becomes that you can't spawn anything or put any items on the ground etc., and it perists through all your saves, what i've found works is to start a new game, get to the point where you can put something on the ground, do so, save, then return to the title screen and load your previous game 

i've been trying to figure out a fix but its been totally mystifying me!! ive never encountered anything like this before, but i'll keep at it, sorry it's been causing you problems but hopefully this is at least a temporary fix!

also talked with zoe about it, she was curious what platform you're playing it on / are you playing in Wine? i've never encountered the bug myself in windows, but she has running the game in Wine, and encountered it a couple times, so if its platform-specific or something that might help us figure it out!! anyway hope its not too much trouble but yea lemme know!