Unable to cast object of type

Hello, I am trying to open Sketch file and get following message: “Can’t open file. Wrong format or internal error: Unable to cast object of type.” I am competely new to Lunacy, any help would be very appreciated. Regards, ws.

Hello, you are very welcome to join our community!!! Please send us the faulty file and we’ll look at it. Our email: lunacy@icons8.com