Unicorn Empire

Hello, I downloaded the "Unicorn Empire" campaign today and wanted to play through it. I successfully completed the 1st mission, but a problem occurred during the 2nd mission. The thing is, in the 2nd mission specifically, there is an option for "retraining" troops, and I decided to use it. So, I entered the Castle, clicked the "retraining" ability, the "garrison" opened, I moved my archers into it, closed the garrison, after which the in-game cursor took on a hourglass icon and froze, as usually happens when a script is activating. At first, I thought I just needed to wait, but when 10 min passed and everything remained the same, I realized that I couldn't even exit Heroes and had to launch the Task Manager. I entered the game again and the same problem occurred; please tell me how to solve this problem