Classic account linking notification and stuck on menu

Grettings,

my problem is like few days ago, that notification about linking classic accounts appeared when launched Warcraft 3. I don’t have a classic account, so I pressed ok to continue playing. Than, I pressed matchmaking, but in vein. Tried to change the volume settings, but the options tab appeared empty, and also pressing “exit” in vein. I tried to restart the pc and game, same happened. I reinstalled the game the next day, it worked well the first time, but, when I came later, I got the same issue that keeps going until this moment. For short, I’m stuck on the menu after pressing “ok” on that classic account link notification. Anyone has the same problem as me ? What can I do ?

Thank you !