the same way as you would install any other component.
And as explained in
I don't believe it tetris is a wonderful game and it works perfectly https://www.latestata.it/social/tetris
I'm happy to present version 3.0 of this great game.
It's almost completely rewritten from scratch and restructured in order
- to add compatibility with the sidebar menu of Ossn 4.x
- to get rid of the iframe to achieve a responsive feeling on smaller devices
- last not least some sounds have been added :)
Thanks again to Eric for the initial release and of course to Lucio PANEPINTO the originator.
Can you enable error logging in Ossn administration and give me log with also apache log.
I just make a clean install to test & don't have problem here.