Found one in the current build, when you find the guardian in the closet as he's resting, whenever you click the use button it tells you "...Now's not the time to do that" no matter if you have interacted or not with him. You can use input to use your inventory, so I find that weird. It happens as both a rat and a human and the use command works everywhere else so far.
Viewing post in Bug Reports
Thanks ! I just found the issue : I recently added .lower to most input from the player to save me some time and space in the synonym lists. However I forgot to edit this situation with the .lower, which meant "Use" with a capital did not appear in the list. I bet you typed "use", right ? It should be fixed now.