CANT PUT TROOP IN DEFENSE!! – Forge of Empires: Build a City Review

Please devs can you fix this I can’t put my troop in defense. I’ll press the button to put them in defense, but sense the button is grey I’m unable to put troops into battle. Checked many times to see If i troops in defense but I don’t. Please devs can you help me.
Review by SwagX3000 on Forge of Empires: Build a City.