Nautilus (file manager) in Zorin 18 randomly stuck and thumbnails problem

A little trick if you have some thumbnails problem with SVG and PNG ( thumbnails have no background)

Clear thubmails cache:

rm -rf ~/.cache/thumbnails/*

Open your terminal and create/edit your profile's CSS file (if it doesn't already exist):

nano ~/.config/gtk-4.0/gtk.css

Copy and paste these lines inside:

.nautilus-window.view .thumbnail {
background: none;
box-shadow: none;
}

Save (Ctrl+O, Enter) and exit (Ctrl+X).

Restart Nautilus to see the change:

nautilus -q

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