Whiteboard

Hello! I was able to use whiteboard but when I clicked on "new board", a box came up that asked for the title, max number of users, and whether it's editable or not.  The problem is it doesn't let me choose the number of users or click "editable".  It stays uneditable and no other users may use it.  It doesn't save the project either. It's apparently preconfigured somehow, somewhere. Does anyone know how to fix this?  Thanks so much!