I have created a "Public (Unlisted)" repository in a team I am owner and I was able to edit the Wiki pages and the homepage. I've created pages and put content in them. I get the following message (*ignore the URL* in the screenshot): {{/media/uploads/spastor/screenshot.png}} After some tests I have found how to reproduce. This only happens when I add a dependency with another library. As long as I add a dependency, the Wiki links throw errors and don't allow editing. It also doesn't matter if the repository is public, unlisted or private. But it does work fine on a personal (not a team) repository. Steps to reproduce: # Create a library repository in a team. I chose "Public (Unlisted)" but it also happened with "Private", didn't try "Public" # Edit homepage, it works fine. # Import into an empty project in online compiler. # Add a dependency with any other library. I used TextLCD. # Commit and publish changes. # Go to repo homepage and try editting. It will not work and will show a "Page error", also the "Wiki" tab won't work. Related question: https://developer.mbed.org/questions/8057/Wiki-edit-stopped-working-for-my-team-re/