Thanks everyone!
I got it working by upgrading to ubuntu 20.

Hi, I've tried to install the stable version of Qelectrotech 0.8 on 18.04 Ubuntu, but the appimage doesn't run (it's asking for `GLIBC_2.28' not found)

I've also tried the snap installation method, and it installs, but won't allow me to save a project.

Has anyone else had this and fixed it?