I have the same updates on the three PCs I tried it on, and only on my main PC it does not work.
Also, it’s a the most recent in term of Windows installation, it worked a few months ago, now it doesn’t.
What is weird is that it still knows which games to look for in my Steam libraries, it just won’t show any (even not installed ones). Too much games causing an issue in the Game Hub ?
I don’t have any games nor Steam installed on the two other PCs (work and Surface Go).