I also had this problem, using Buster on a Raspberry pi 3b.

It started with my npm being to old, unable to upgrade because my node was to old.
Installing the newest node gave me the `GLIBCXX_3.4.26’ not found (required by node) error.

The solution for me was installing the LTS version of node using nvm.

nvm install 'lts/*' --reinstall-packages-from=current
nvm alias default 18

this uses node version 18.

after that I could upgrade npm

nvm install-latest-npm

and with all this in place the upgrade of magic mirror worked.

Hope this helps

@bobbythemoh said in MMM-Loxone:

@idoodler yes i did reboot. and i just uninstalled xscreensaver (after that i did a reboot) but no change in the behaviour.

@E3V3A I used “uname -a”:
Linux MagicMirror 4.14.34-v7+ #1110 SMP Mon Apr 16 15:18:51 BST 2018 armv7l GNU/Linux

Bobby do you have a solution for this? I’m having the exact same problem since updating my pi to the latest version of rasbian

Thank you for your work @Snille! Got it working on my mirror yesterday. Works great!