Collaborate links are not working. When opened by another user, they get "410 - The requested page has expired", if the project visibility is set to private.
If set to public, when clicking the link they arrive to the normal object details page, wher they can copy, comment and download.
And yes, I do include the equal sign in the end. I've tried with Mozilla Firefox Quantum 61.0.2 and Microsoft Edge 42.17