When I joined Skyblock I was informed of a "/challenges list" that shows challenges for Skyblock. I tried the command and all it was saying was "You do not have permission for this command". So I tried "/challenges" and it gave me two options for "/challenges list" and "/challenges complete <id>" both of which I could not do because they both said "You do not have permission for this command". I was later informed of trying "/island challenges" or "/island challenges list" and they showed me all the commands I could do for Skyblock, but still did not show me the challenges.