Roblox wont install?

'Macbook AIR" "Operating system - macOS Sierra Version 10.12.6"

So randomly a week ago i was playing a game called "Roblox' which you need to download to play

Well it crashed and i had to delete the app off the mac and try and reinstall it

after reinstalling it and getting the "roblox player" and trying to "configure" the roblox app on the macintosh, it crashes and deletes its self and never seems able to install, i can provide video footage of me attempting to install it if needed, but i'll just explain it

1. I go to roblox.com and sign in

2. I go to "games" tab and click a game

3. It says i need to download the client so i proceed in doing that

4. It gives me the roblox player which i use to try and install the roblox app itself

5. As it is "configuring" it crashes on me and never seems to work

a. Whenever it seems to "succesfully download" the app deletes its self when trying to start a game which requires the apps use

If anyone can help me, it would be much appreciated, thank you.