Grub customizer not working on Ubuntu Mate 22.04

Hey guys again

How to make grub customizer work!

it is not working

Your question is unclear. How did you installed it? Which error messages do you have?

To install GRUB Customizer for first time I would use famous PPA and commands below:

sudo add-apt-repository ppa:trebelnik-stefina/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer

and then launch it from the menu.

I have installed exactly the same method which you have shown and the message I receive is error inrelease key something like this like there is no public key or something.

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