Problems with shockwave flash

I was used to playing the game Family Farm on facebook for many years. Since the beggining of 2020 I have been having problems loading the game but suddenly, after some facebook changes, an error screen is shown, and the game doesn´t run...It is always shown that the shockwave flash has failed and one of the suggestions was to uninstall flash and reinstall it after...

Well, I tried to do it some hours ago and now I can´t download it again...

What can I do to solve the problem? Is there any plugin to substitute it?

Thanks for the attention