Hi there,
Sorry to hear you are having trouble!
I've just loaded your save and I can see that you're still on the objectives before Spirit Keys are available to build. If you open the Netherworlds map, the "Paranormal Detection Agency" POI is available to unlock so after doing that and completing more Buzz objectives, you should be ready to continue.
I hope that helps!
Chizel
First off, I'm playing in Campaign mode, if that's relevant to the devs. From what I've heard, the Spirit Key is supposed to be unlocked at the Workshop once you open the museum at Wailon Lodge, but it's just not there. I thought maybe doing enough expeditions would unlock it, but no luck with that.
Without much else to do, I went to Passwater Cove to open a marine museum, but I can't even do any ocean expeditions there at all. Wondering if these are somehow related; like if I don't get the star in Wailon Lodge first, I can't proceed in Passwater Cove or something. Unfortunately the whole situation has pretty much brought my playthrough to a standstill. Was enjoying it a lot before this!
Edit: After restarting the game, I cannot even look at Expedition Items at the workbench at all, and cannot start an expedition anywhere other than the Bone Belt.
Note: I have seen at least a few others with the same issue, but unfortunately I was unable to add a comment with this information on that report, so I guess the website maybe needs some work too.