I did encounter a slight problem: when I tried to use the free spin bonus I received, I couldn't play at all. However, when playing normally, everything went smoothly.

Try asking Casinopunk support about this issue, as it is usually due to provider restrictions, or you can use a VPN to access the game, which is usually allowed. It is best to ask support so there is no confusion.
In the past, it was recommended to use a Swedish or Slovakian VPN to play this freespin.