I have a free plan on Trello with only 8 users. I believe that the limit is 10 users for the free plan. However, when I am trying to add a new user, the tool is not allowing me to...
A few weeks back, I had 10 users but I removed 2 collaborators because they no longer work on the project.
What can I do to add new collaborators / users to my Trello board.