Hello! Did you drag the ranger to the board from the "bench"? First row/part of the border on the most bottom side of the screen are your Inactive Sloths. To start a fight you have to have atleast one on the board. If you could post a screenshot/send a link to one I could probably do more to help. If nothing is working on the "final" build, you can also try backup one. It's less stable, but might not have this issue in it.