microsoft defender won't open

The other day, when I initialized Defender without inheriting the folder, an error message saying [Restricted by IT administrator] appeared and I was unable to scan.

While investigating various things, I was able to find out that the problem was caused by the disappearance of the contents of the [C:\Windows\System32\SecurityHealth] folder. In order to recover the folders inside this, I opened a site from Microsoft Support where you can download update files.

I'm stuck with an error message like this and can't download it.

<エラー>

I've managed to revive it, but if anyone knows what to do, please let me know <(_ _)>