Monopoly Event Error – Unable to Add Fourth Partner Despite Active Event

I'm really annoyed by a problem that won't go away in the Partners Event of the Monopoly game. The event is still going on, but I haven't been able to add my fourth partner for a few days because of a continuous error. I keep running into the same issue every time I try, and neither new cards nor changes are showing up.

Unfortunately, this bug has made it impossible for me to play, and I'm now thinking about ending the game. It's not fair that people can't get the prizes because of technical issues, so I urge the developers to fix this right away, before the event ends. Please fix this mistake so that all people can fully take part in the event.