Can't open the download assistant on MacOS version 12.3

I downloaded the download system but when I want to open it it just closes and nothing happens. If I’m not mistaken it should open a window where I can connect it to my Steinberg account. I want to start the free trial because I would like to try it out and get used to it so I can buy the full version. There shouldn’t be a problem with the software because the Mac is brand new. Can you please tell me what the problem is because I’m really confused?

Thank you.