I own the new DMG, and in it there is a cool item called the Hat of Many Spells. My players found one last session, but they couldn't add it to their character sheet. Apparently, it's because it is also in the book "Uni and the Hunt for the Lost Horn", but that hasn't been released yet, so even though it is in the DMG, it is unavailable until I buy that book when it is released. This cannot be right, can it? I had to make a homebrewed item to be able to add it to the inventory...
I own the new DMG, and in it there is a cool item called the Hat of Many Spells. My players found one last session, but they couldn't add it to their character sheet. Apparently, it's because it is also in the book "Uni and the Hunt for the Lost Horn", but that hasn't been released yet, so even though it is in the DMG, it is unavailable until I buy that book when it is released. This cannot be right, can it? I had to make a homebrewed item to be able to add it to the inventory...
Edit: I missed it's in the DMG. That it's also in the free adventure is not why they can't add it.
Is content sharing on in the campaign?
If it is, have the player check their entitlements (user menu->account->licenses)
Turn content sharing off then on again.