I use fedora silverblue 36 I have a fail that makes that I can’t install GNOME extensions when I try to install GNOME extension doesn’t appear the window of install extension
I don’t know if you’re trying to layer them but I use the unofficial extension manager instead and it works great.
There was a problem with the GNOME Extensions website several hours ago… but it was fixed a few hours ago. It affected installing extension via the browser and also through the Extension Manager app.
(I didn’t see the problem myself, but did see people mention it around the Internet.)
It looks like the issue was introduced in gnome-shell 42.3.1 and a fix was deployed on the extensions.gnome.org website.
TL;DR: It was a bug, but it is now fixed.