Weird Persistent Error

I'm working on implementing the card Goblin Game, and I've gotten a little stuck.
At one point, I looked at cards like Mindblaze or Void, which also deal with choosing numbers of things, leading me to attempt to use .addChoice(Choice choice). I realised later that using that method wouldn't work, because I need to send a choice to all players, not just the controller.
However, after rebuilding the project multiple times, I keep getting the error below when I try to play the card in-game.
So yeah, I'm confused as to why I'm getting an error that involves 'choosing' when the only code I have in terms of making a choice is .announceXMana(...), which worked before I made and undid the changes I described above.
At one point, I looked at cards like Mindblaze or Void, which also deal with choosing numbers of things, leading me to attempt to use .addChoice(Choice choice). I realised later that using that method wouldn't work, because I need to send a choice to all players, not just the controller.
However, after rebuilding the project multiple times, I keep getting the error below when I try to play the card in-game.
So yeah, I'm confused as to why I'm getting an error that involves 'choosing' when the only code I have in terms of making a choice is .announceXMana(...), which worked before I made and undid the changes I described above.
- P.S. | Open