I created a public Trello board and previously my students were able to copy it without any issues. However, recently the option to "Copy Board" has disappeared, and they are no longer able to copy it. The board's visibility is set to "Public," and I haven't made any changes that should affect this functionality. Could this be related to a new limitation or setting change? How can I restore the ability for others to copy my board? Any help would be greatly appreciated!