hey there, enjoying this interactive VN quite a bit, could see it becoming an interactive Netflix series sometime :) anywyay, in the game i'm at the part where the main character and Ewan are in the club house and they're just starting to talk about faerie hills and have received 2 of these errors (so far). 
Yeah, that is definitely from the game trying to decode a journal entry. I'm not sure what's causing it to throw the error since I can play through that part with no issues and the journal entry decodes fine. D=
Unfortunately, in a situation where I can't actually replicate the error, I can't identify what's causing it. My only suggestion can be to try to restart the game and see if it helps. ;~;