Stardew Valley Community Center is not working?

I play on the Nintendo Switch stardew valley and have a problem with the community center. I can't finish a room there when I go to room 1 (workshop) on the luminous plate is a field where only something in another language and I can't touch anything.

What should I do? Was it like that for you, too?

One should have received a letter from the magician to visit him. Did you do this?

No not yet.