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@Jane_Pim Hi and welcome, As explained above we do not support Faceboook gameroom . As to your question the only platform the game is on now is HTML5, flash is no longer supported by any browsers and all king games for PC are in HTML5 format.
You need to check your windows is updated and your browser is latest version clear your browser cache entirely and then restart your device and see if this solves your issue. Try the game on King.com/games as well as this is also a browser platform and see if this works for you
Thank you