installing roblox on Macbook air with Sonoma OS

HI,

I'm trying to install Roblox on my MacBook Air. I can download the file but when I click on the installer nothing happens, I just get a new window which is blank, except for a "Done" Button. I click on this, it closes the window but nothing happens and I still can't use Roblox.

Anyone have any ideas on how I can fix this?

Thanks

Rob