Yeah, the most likely option is that something went wrong when submitting, because I'm sure I separated all words with line breaks (those you mentioned before) and the link to the image also was correct, because I checked that as well.. :( I only have one account so that can't be the case either

Is there any way to find out what went wrong when I found all 10 words and submitted a correct image on time while not getting the participation reward?

Will the answers to the mini quest be posted somewhere after the deadline? Because I really can't find any clues after the first one and I'm curious to find out more :)