The free version only allows the creation of three boards. You do not have to purchase a Miro license to complete or be successful in the boot camp. To overcome the board limit, we recommend that you maximize the amount of space used on a board and take frequent screenshots of your boards to save your work.
If You Need a New Board, Here Are Some Options
Delete an existing boards you aren’t using or are empty.
Ask a teammate with less than three boards to create a new one.
If a Board is View Only
Have the board owner double check the “Share” permissions and update setting to “Can Edit”.