I had my Astroberry die.

So, I am experimenting with trying to install Indi/Ekos/Kstars on an Orange Pi PC+. I have Ubuntu installed, but when I attempt to:
sudo apt-add-repository ppa:mutlaqja/ppa

I get the following error:
Cannot add PPA: 'ppa:~mutlaqja/ubuntu/ppa'.
ERROR: '~mutlaqja' user or team does not exist.

What did I do wrong?

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