Wanted to share this experience for anyone else having issues after upgrading ubuntu to 22.04
After upgrading ubuntu to 22.04 Joplin wouldn't run when I tried to start it.
Apparently on Ubuntu 22.04 a library needs to be additionally installed for appimages to properly run.
On Ubuntu 22.04, we had to install a library file. FUSE is already installed on Ubuntu 22.04, but it is a version more recent than that used by the majority of AppImages. Installing the library file doesn’t affect the installed version of FUSE.
sudo apt install libfuse2