I have the same issue as Kayozen. You can take the bags from the Wayfarer, but points are not removed and you cannot open it. I have tried right clicking, left clicking, putting in my hotbar, selecting, left and right clicking then, it refuses to open. put it in a chest and the sprite kinda goes away to a plain white bag with the name of the bag and that's it. EDIT: Okay upon writing this, I opened up a server to get you the logs file. My friend who I was playing with was offline, so it was just me. When I went to go buy the bag from the wayfarer, there was no issue. Clicked the bag, it opened, progress points spent. It seems the error happens if there's more than one person in the world.