The same message is also displayed while using "Gulp!".

By the way, I observed that two other trinkets ("Wish Bone" and "Bag Lunch") were also unable to take effect properly two days ago, and it also provided similar error message, but this situation no longer occurs today. I‘m not sure if it's because I loaded Repentance+ (I used to play without Repentance+, but I loaded it in an attempt to find the cause of the error). But I don't have my computer with me right now, so I can't give a definite description of this situation. What I can confirm is that the error exists when using "Gulp!" regardless of whether Repentance+ is loaded or not.