validate

Today I can't login... Launcher opens but play button have no effect. Celeste.exe does not start. ...in which way can I solve the bug without re installing the game? Thank you in advance!

"Unable to vaildate the game files" This message keeps popping out recently, it says 'unable to validate game files'... This is kind of strange problem, because I DO have a game files... all downloaded that needs to progress the game;;; I run a game scan several times to solve this...