SUCCESS!!! 🥳
I was finally able to upgrade my #YunoHost #PeerTube installation (thanks to the advice of Fedi people).
Long story short, yesterday I tried to upgrade using YunoHost's graphical user interface but I lost the connection to the server, my PeerTube installation broke and was automatically removed from my list of apps. I could restore to the pre-update backup but my PeerTube site was still broken, showing a "welcome to nginx" message. Thankfully I had taken a snapshot of my VPS, so I was able to restore everything within a few minutes.
Following my accounts of what happened, @teapot_ben and @drfyzziks recommended I install tmux and do app upgrades from terminal, inside tmux, so that server connection issues wouldn't interfere with app upgrades. So I did. And this time everything worked! (huge sigh of relief)
It's so much fun upgrading YunoHost apps from Terminal. I think this will be the way for me from now on 🤗
#MySoCalledSudoLife