The tiling on tweak doesn't work and when I do tile an image for an wallpaper, it causes the wallpaper to be zoomed in extremely.
Gnome dev's go out of their way to break extensions in tweaks. Tweak extensions are not part of the Gnome DE and are done by regular people.
Some of them will work, some won't as long as whoever did the extensions keeps up with all the changes that Gnome Dev's put out. But in some cases it can not be fixed at all.