Delete all files from a second level directoty inside a hidden directoty in Ubuntu MATE 21.04 using a Bash script

I have gone through quite a few threads on AskUbuntu and elsewhere but as it sounds, all of them are about deleting hidden files, while I'm trying to:

delete non-hidden files, from a non-hidden directory, which is inside a hidden directory.

I like to delete all files inside /home/admn/.cache/thumbnails/normal/ directory using a Bash script.

The simple script that I have created:

sudo nano /usr/local/scripts/test.sh

#!/bin/bash

shopt -s dotglob

rm '/home/admn/.cache/thumbnails/normal/*'

shopt -u dotglob

Note: As suggested, I've tried using double-quotes " in the script, but still getting the same error.

sudo chmod +x /usr/local/scripts/test.sh

The error I'm getting:

rm: cannot remove '/home/admn/.cache/thumbnails/normal/*': No such file or directory

Thanks.