1- run this command in terminal

2- run Krita from steam











why this?
Appimage requires "libfuse2", and Ubuntu doesn't have it in default unlike other distro

just use this command

1. open the terminal.
   
2. install steam (official non-free fedora repo)
   
   sudo dnf install steam
   
   type "yes" to download and install.
   
   
3. after you finish the install process run Steam by typing on the terminal.
   
   steam
   
   
4. now you can run Krita