Quest "Ghost Hunting the 1st" and "Ghost Hunting the 3rd" won't complete! [SOLVED]

Nikodemonek

I have found all of the hidden ghosts in "It's a Trap!" and the quests won't complete!

Can someone help?

Motivation

You have to approach it and go near the sign. It's in the ghost's back.

Nikodemonek

Okay, thanks!